CCNA Flashcards 2
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No broadcasts, autoconfiguration, and Plug and Play defines what routed protocol?
answer
IPv6
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How many collision domains exist when a hub is used?
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One
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The __________________ part of a MAC address is assigned by the IEEE to an organization and is composed of 24 bits, or 3 bytes.
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organizationally unique identifier (OUI)
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On which layer of the OSI model do routers operate?
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Network
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What address is the equivalent of the IPv4 interface loopback address 127.0.0.1?
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::1
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To specify all hosts in the Class C IP network 192.16.8.0, what wildcard access list mask would you use?
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0.0.0.255
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Which IPv6 address is the all-router multicast group?
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FF02::2
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Which router command allows you to determine whether an IP access list is enabled on a particular interface?
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show ip interface
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What router command allows you to view the entire contents of all access lists?
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show access-lists
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What causes the incrementing of runts on an interface?
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Collisions
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True/False: FE08::280e:611:a:f14f:3d69 is a link-local address.
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False. Link-local addresses start with FE80::.
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What is the dotted-decimal equivalent of /15?
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255.254.0.0
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Which command applies access list 10 inbound to an interface?
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Router(config-if)#ip access-group 10 in
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Which command enables IPv6 forwarding on a Cisco router?
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ipv6 unicast-routing
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________ lists use the numbers 1-99 or 1300-1999 and filter based on source IP address only.
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Standard IP access
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The block size of a /26 network is _______.
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64
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The output of the show startup-config command comes from ___________.
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NVRAM
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What standards-based protocol works much like CDP?
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Link Layer Discovery Protocol (LLDP)
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What command is used to manually assign a static IPv6 address to a router interface?
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Router(config-if)#ipv6 address address
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What length of subnet mask do routes in the routing table marked with an L have?
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/32
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True/False: The tunnel mode ipv6ip command enables the transmission of IPv6 packets within the configured tunnel and specifies IPv4 as the encapsulation protocol.
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True
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Which IPv6 header field is equivalent to the TTL in the IPv4 header?
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Hop Limit
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True/False: Layer 2 switches and bridges are faster than routers because they don't take up time looking at the Data Link layer header information.
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False: They are faster because they don't read Network layer information.
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True/False: VLANs greatly reduce network security.
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False. The can increase security.
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True/False: When a packet is being compared to an access list, it's always compared with each line of the access list in sequential order until it finds a match.
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True
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_____ on an Ethernet network is the retransmission delay that's enforced when a collision occurs.
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Backoff
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What is the PDU called at the Data Link layer?
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Frames
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What Application layer protocol sets up a secure session that's similar to Telnet?
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SSH
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What command, enabled by default starting with Cisco IOS version 12.x, allows the use of the first and last subnet in a network design?
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ip subnet-zero
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What mask yields only six IP addresses per subnet?
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255.255.255.248, or /29
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True/False: IPv6 headers reuse the IPv4 Checksum field.
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False. IPv6 headers eliminate the checksum field.
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Which command backs up the Cisco IOS to a TFTP server?
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copy flash tftp
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What protocol resolves IP addresses to MAC address?
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ARP
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What command provides an excellent overview of the actual operation of all currently running protocols?
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show ip protocols
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True/False: Layer 2 switches and bridges look at the frame's hardware addresses before deciding to either forward, flood, or drop the frame.
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True
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Type the command that must be present for a layer 3 switch to provide inter-VLAN routing between the two VLANs.
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ip routing
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True/False: IPv6 uses an extension header instead of the IPv4 Fragmentation field.
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True
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What device hosts a different subnet on each interface?
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Router
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True/False: IPv6 headers have a fixed length.
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True
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What mechanism is used by the client to avoid a duplicate IP address during the DHCP process?
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Gratuitous ARP
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The advertised prefix length of an IPv6 router advertisement message must be what length?
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64 bits
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How many subnets are contained in the network 192.168.1.0.0/27?
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Eight
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What IP address is called the loopback address?
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127.0.0.1
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What is the HyperTerminal setting for connecting to a Cisco router?
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9600 bps, parity None, 1 stop bit, and 8 data bits
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What type of cable is used to connect to a console port of a router?
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Rolled or rollover
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What type of Ethernet cable is used to connect from a hub to a switch?
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Crossover
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The _______________ command causes the system to return you to your previous prompt after displaying a console message.
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logging synchronous
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What is the ICMPv6 router advertisement type?
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134
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What does the configuration register setting of 0x2102 do?
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Tells the router to look in NVRAM for the boot sequence
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Which command can be used to determine a router's capacity to generate debug output?
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show processes cpu
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What is the IPv6 Link Local prefix used for unicast?
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FE80::/10
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Which two features can dynamically assign IPv6 addresses?
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IPv6 stateless and stateful autoconfiguration
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What is the solicited-node multicast IP address for 2001:DB8:1001:F:2C0:10FF:FE17:FC0F?
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FF02:0000:0000:0000:0000:0001:FF17:FC0F
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Which Cisco IOS command do you use to configure stateless autoconfiguration?
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ipv6 address autoconfig
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What are three characteristics of satellite Internet connections?
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Their upload speed is about 10 percent of their download speed, they are frequently used by rural users without access to other high-speed connections, and they are usually at least 10 times faster than analog modem connections.
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What are two requirements for an HSRP group?
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Exactly one active router, one or more standby routers
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True/False: HSRP is a standard FHRP.
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False
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What three items must match for a successful EIGRP neighbor discovery process?
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The AS number, K values, and authentication settings if used
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What algorithm is used by EIGRP for selecting and maintaining the best path to each remote network?
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DUAL
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What is the backup HSRP router called?
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Standby
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In HSRP, what IP address should be the gateway of the hosts?
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The IP address of the virtual router
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What HSRP feature can be used to monitor the uplinks of the routers?
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Interface tracking
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What value is used to select the HSRP active router?
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Priority
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What is the default priority of an HSRP router?
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100
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True/False: HSRP performs true load balancing.
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False
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What is the first step in the NAT configuration process?
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Define inside and outside interfaces.
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Which NAT function can map multiple inside addresses to a single outside address?
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PAT
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After you configure the Loopback0 interface, which command can you enter to verify the status of the interface and determine whether fast switching is enabled?
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show ip interface loopback 0
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Which spanning-tree protocol rides on top of another spanning-tree protocol?
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MSTP
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What is it called when a router with a higher priority retakes the AVG role after being down?
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Preemption
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To send messages to the VTY lines, use what command?
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terminal monitor
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Which command sequence can you enter to create VLAN 20 and assign it to an interface on a switch?
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Switch(config)#vlan 20 Switch(config)#Interface gig x/y Switch(config-if)#switchport access vlan 20
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Which command can you execute to set the user inactivity timer to 10 seconds?
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(config-line)#exec-timeout 0 10
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What are two reasons that duplex mismatches can be difficult to diagnose?
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The interface displays a connected (up/up) state even when the duplex settings are mismatched; the symptoms of a duplex mismatch may be intermittent.
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What version of SNMP increased security?
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SNMPv3
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What type of SNMP message is used to retrieve information from a device?
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GET
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What version of SNMP added the GET BULK message?
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SNMPv2c
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What is the collection of information organized hierarchically and accessed by SNMP?
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Management information base (MIB)
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What version of SNMP added the INFORM message?
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SNMPv2c
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Which command can you enter to display the hits counter for NAT traffic?
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show ip nat statistics
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Which type of address is the public IP address of a NAT device?
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Inside global
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True/False: Static routing uses consistent route determination.
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True
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True/False: Routing is disrupted when links fail.
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True
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Why does Cisco uses its proprietary extension of PVST+ with STP and RSTP?
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Root bridge placement enables faster convergence as well as optimal path determination.
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If primary and secondary root switches with priority 16384 both experience catastrophic losses, which tertiary switch can take over?
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One with a higher priority, even if a switch with a lower priority is available.
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Which command can you enter to view the ports that are assigned to VLAN 20?
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show vlan id 20
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What does BPDU Guard perform?
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BPDU Guard shuts down a port if a BPDU is seen on that port.
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Which two modes enables LACP EtherChannel?
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Passive, active
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What command is used to determine the name and size of the IOS file?
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show flash
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What is an image with all feature sets available called?
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Universal
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What are version 15.0 evaluation licenses called?
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Right-To-Use licenses
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What command displays the unique device identifier (UDI) of the router, which comprises the product ID (PID) and serial number of the router?
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show license udi
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On which types of networks will OSPF elect a backup designated router?
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Non-broadcast and broadcast multi-access
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Which three characteristics are representative of a link-state routing protocol?
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Provides common view of entire topology, calculates shortest path, utilizes event-triggered updates
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True/False: You will get late collisions if you have a broadcast storm.
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False
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Which OSPF state do two routers forming an adjacency appear as in the show ip ospf neighbor output after neighbors are added into the table and hello information is exchanged?
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2WAY
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What is the metric of a remote network as reported by an EIGRP neighbor called?
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Advertised distance
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What three items must match exactly in order for an OSPF adjacency to occur between routers?
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Hello/dead timers, area, IP configuration
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What is the metric reported by the neighbor plus the metric to the neighbor reporting the route?
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Feasible distance
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How was the following route learned?D 10.0.0.0/8 [90/2195456] via 172.16.10.2, 00:27:06,Serial0/0
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EIGRP
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What EIGRP table contains all destinations advertised by neighboring routers, holding each destination address and a list of neighbors that have advertised the destination?
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Topology table
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EIGRP will keep up to ____ feasible successors in the topology table in 15.0 code.
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32
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True/False: A feasible successor is a backup route and is stored in the topology table.
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True
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Which type of LSA is generated by DRs and referred to as network link advertisements (NLAs)?
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Type 2
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True/False: You will receive late collisions if you have a duplex mismatch
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True
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What is the danger of the permit any entry in a NAT access list?
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It can lead to overloaded resources on the router.
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What command will show you the root bridge for VLAN 10?
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show spanning-tree vlan 10
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What is the bandwidth of a T3?
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44.736 Mbps
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What is the bandwidth of an E1?
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2.048 Mbps
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True/False: A link joins an MLP bundle only if it negotiates to use the bundle when a connection is established and the identification information that is exchanged matches that of an existing bundle
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True
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When the speed provided for both downstream and upstream connections is equal, what type of DSL is in use?
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Symmetrical DSL
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What is the name for the service that encapsulates PPP frames in Ethernet frames?
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PPoE
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What type connector is a V.35?
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V.35 is a serial standard used to connect to a CSU/DSU, with speeds up to 2.048 Mbps using a 34-pin rectangular connector
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True/False: HDLC is the default serial encapsulation on a Cisco router.
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True
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What protocol uses LCP as one of its components?
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PPP
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True/False: Passwords are sent in clear text using CHAP.
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False
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What command is used to observe the PPP authentication process in real time?
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debug ppp authentication
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True/False: Cloud computing is delivered as a service rather than a product.
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True
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Which two types of NAT addresses are used in a Cisco NAT device?
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Inside local and inside global
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Which protocol in the PPP stack provides built-in authentication methods, compression, and multilink?
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LCP
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What are the three steps in a PPP session establishment?
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Link establishment, optional authentication, network layer protocol phase
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What technology is used by traditional telephone companies to deliver advanced services (high-speed data and sometimes video) over twisted-pair copper telephone wires?
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DSL
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What structures does MPLS use to identify the path to a destination?
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Labels
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The Cisco StackWise technology is typically used to unite access switches that are mounted in the same rack and creates some management overhead.
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True
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True/False: The following three service models are typically provided from a cloud: IaaS, PaaS, and SaaS
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True. The three service models are Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).
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True/False: SDN offers a centralized view of the network, giving an SDN controller the ability to act as the "brains" of the network.
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True
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The SDN architecture slightly differs from the architecture of traditional networks. It comprises three stacked layers (from the bottom up). What are these three layers?
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Data (or forwarding) plane, control plane, application plane
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What is Cisco's latest SDN Controller platform for enterprise networks (access, campus, and WAN)?
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Cisco Application Policy Infrastructure Controller Enterprise Module (Cisco APIC-EM)
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What are the four components of IWAN?
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Transport Independent Connectivity, Intelligent Path Control, Application Optimization, Highly Secure Connectivity
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True/False: DHCP snooping is a layer 2 security feature that acts like a firewall between untrusted hosts and trusted DHCP servers
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True/False: DHCP snooping is a layer 2 security feature that acts like a firewall between untrusted hosts and trusted DHCP servers
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The IEEE 802.1x standard allows you to implement the identity-based networking based on the client/server access control. What are the three roles defined by the standard?
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Client (supplicant), Authenticator (usually a switch or AP), Authentication server (RADIUS)
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What command, and at which prompt, is used to enable EIGRPv6 on the Corp router in AS 10?
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Corp (config) #ipv6 router eigrp 10
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To what multicast address are hello packets sent in EIGRPv6?
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FF02::A
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The two most popular options for external AAA are what?
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RADIUS and TACACS+
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In QoS mechanisms, after you have identified and marked traffic, you can treat it by a set of actions. These actions include which five options?
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include bandwidth assignment, policing, shaping, queuing, and dropping decisions
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True/False: NBAR is a layer 1 to layer 7 deep-packet inspection classifier.
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False. It is a layer 4 -7 classifier.
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In the following output, what value is the feasible distance? P 2001:DB8:C34D:15::/64, 1 successors, FD is 2170112 via FE80::209:7CFF:FE51:B401 (2170112/2816), Serial0/0/1
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2170112
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NBAR has two different modes of operation. What are they?
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Passive and active mode
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What are the three general ways to classify traffic?
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Marking, addressing, and application signature
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What command, and at what prompt, places an interface in area 0 for process 1 using OSPFv3?
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Corp (config-if) #ipv6 ospf 1 area 0
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Which proprietary Cisco STP extension would put a switch port into error disabled if a BPDU is received on this port
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PortFast with BPDU Guard
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True/False: DSCP is a set of 6-bit values that are used to describe the meaning of the layer IPv4 ToS field
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True: While IP precedence is the old way to mark ToS, DSCP is the new way.
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What command will you use to see information about a specific port channel interface?
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show etherchannel number port-channel
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We configure the bridge priority in blocks of _______ rather than in increments of 1 in PVST+.
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4,096
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True/False: The address 0000.0c07.ac0a is an HSRP address.
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True
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What is the HSRP group number in the following HSRP address? 0000.0c07.ac0c
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12
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Generally, you can place QoS tools into different categories. What are they?
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Classification and marking tools; policing, shaping, and remarking tools; congestion management or scheduling tools; link-specific tools
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Two OSPF neighbors are stuck in EXCHANGE/EXSTART state. What could be possible reason for it?
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Mismatched MTU
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Which Cisco technology allows up to nine individual switches joined in a single logical switching unit?
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StackWise
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What are two typical examples of layer 2 VPN?
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VPLS and VPWS
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VPNs provide many benefits. List four.
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Cost savings, scalability, compatibility with broadband technology, security
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IPsec provides four important security services. What are they?
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Confidentiality (encryption), data integrity, authentication, antireplay protection
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True/False: The Cisco DMVPN feature provides simple provisioning of many VPN peers.
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True
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Which NTP command configures the local device as an NTP reference clock source?
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ntp master
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What is the subnet and broadcast address of this host: 10.16.3.65/23?
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10.16.2.0 255.255.254.0, 10.16.3.255 255.255.254.0
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Under which circumstance should a network administrator implement one-way NAT?
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When the network has few public IP addresses and many private IP addresses require outside Internet access
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True/False. When configuring static routes, an exit interface can be specified to indicate where the packets will be routed.
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True
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Which device allows users to connect to the network using a single or double radio?
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Access point
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Which method does a connected trunk port use to tag VLAN traffic?
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IEEE 802.1 Q
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True/False. This is a valid hostname for a switch following Cisco's guidelines: 5witch-Cisco
answer
False.
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Which function enables an administrator to route multiple VLANs on a router?
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Router on a stick
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True/False. Routers perform this on a packet: Update the layer 3 headers of outbound packets so that the packets are properly directed to their ultimate destinations.
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False. They update the Layer 2 headers of outbound packets with the MAC addresses of the next hop.
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True/False. Routers perform this on a packet: Examine the layer 3 headers of inbound packets and use that information to determine the next hops for the packets.
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True
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A workstation has just resolved a browser URL to the IP address of a server. Which protocol will the workstation now use to determine the MAC address to be placed into frames directed toward the server?
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ARP
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Which RFC was created to alleviate the depletion of IPv4 public addresses?
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1918
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Configuration of which option is required on a Cisco switch for the Cisco IP phone to work?
answer
A voice VLAN ID in interface and global configuration mode
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At which layer of the OSI model does the protocol that provides the information that is displayed by the show cdp neighbors command operate?
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Data Link
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Two hosts are attached to a switch with the default configuration. How many broadcasts are there?
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One
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On which type of device is every port in the same collision domain?
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A hub
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What is the default lease title for a DHCP binding?
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24 hours
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Which MTU size can cause a baby giant error?
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1600 bytes
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True/False. Tracert uses ICMP packets.
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True
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Which route source code represents the routing protocol with a default administrative distance of 90 in the routing table?
answer
D
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Which component of the routing table ranks routing protocols according to their preferences?
answer
Administrative distance
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Which component of a routing table entry represents the subnet mask?
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Prefix
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Which value is indicated by the next hop in a routing table?
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IP address of the remote router for forwarding the packets
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Which dynamic routing protocol uses only the hop count to determine the best path to a destination?
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RIP
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Which feature allows a device to use a switch port that is configured for half-duplex to access the network?
answer
CSMA/CD
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A transmitting host MAC address is not in the MAC table of a switch. What will the switch will do when it receives the frame from the host?
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The switch will add the source address and port to the MAC address table and forward the frame to the destination host if known; if not, it will flood the frame.
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What is one requirement for interfaces to run IPv6?
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An IPv6 address must be configured on the interface.
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Which routing protocol has the default administrative distance of 90?
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EIGRP
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Which technology supports the stateless assignment of IPv6 addresses?
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Autoconfiguration
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By default, how many MAC addresses are permitted to be learned on a switch port with port security enabled?
answer
1
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Which NAT type is used to translate a single inside address to a single outside address?
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Static NAT
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True/False. Cisco Discovery Protocol traffic travels on the native VLAN by default.
answer
True
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Which address type does a switch use to make selective forwarding decisions?
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Destination MAC address
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True/False. TCP provides sequence numbering of packets.
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True
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True/False. TCP provides synchronized communication.
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True
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On a Cisco switch, which protocol determines if an attached VoIP phone is from Cisco or from another vendor?
answer
CDP
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Which destination IP address can a host use to send one message to multiple devices across different subnets?
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A multicast address. Range is 224.0.0.0 through 239.255.255.255.
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When enabled, which feature prevents routing protocols from sending hello messages on an interface?
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Passive-interface
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Which option is the default switch port port-security violation mode?
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shutdown
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True/False. Configuring the inside interface identifies the location of source addresses for outgoing packets to be translated using access lists or route maps.
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True
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Which option must occur before a workstation can exchange HTTP packets with a web server?
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A TCP connection must be established between the workstation and the web server.
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True/False. If the destination MAC address is unknown, the frame is flooded to every port that is in the same VLAN, except the port it was received on.
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True
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When a router makes a routing decision for a packet that is received from one network and destined to another, which portion of the packet is replaced?
answer
Layer 2 frame header and trailer
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Which network topology allows all traffic to flow through a central hub?
answer
Star
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True/False. OSPF is a link-state routing protocol.
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True
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True/False. RIP is a link-state routing protocol.
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False
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A host uses something called a _____________ to help avoid a possible duplicate address. The DHCP server uses a _______ session to check for duplicates.
answer
Gratuitous ARP, ping
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With a /28 mask, the mask is ___________________, the block size is ___________________, and the number of host addresses available is ___________________.
answer
255.255.255.240, 16, and 14
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This command displays information about the Cisco IOS software version currently running on a routing device, the ROM monitor and Bootflash software versions, and information about the hardware configuration, including the router's configuration register.
answer
Show version
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To enable IPv6 routing on the Cisco router, use the following command: ______________.
answer
ipv6 unicast-routing
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The _________________ command displays any security settings that have been applied to the port.
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show port-security
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What type of ACL uses the numbers 1-99?
answer
Standard
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When TCP is used as the Transport protocol, it can use ____________ for flow control.
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Windowing
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TCP uses the protocol number ___?
answer
6
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With 220.168.16.128 as the network address and 255.255.255.224 as the subnet mask, we have a range of IP addresses from?
answer
220.168.16.129 to 220.168.16.158, broadcast address .159.
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The four simple steps that Cisco recommends for troubleshooting are (in this order) ping the loopback address, ping the NIC, ping the default gateway, and ping the remote device.
answer
True
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The copy startup-config running-config command enables a switch (or a router) to copy the configuration from RAM to its NVRAM.
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False
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Which command specifies the address of the DHCP server, which allows the router to relay broadcast traffic destined for a DHCP server to that server?
answer
ip helper-address
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The show ipv6 arp command displays the current MAC-to-IPv6 mappings.
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False
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The switchport port-security command enables port security, which is a prerequisite for the other commands to function.
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True
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Unlike 802.1q, which encapsulates the frame with control information, ISL inserts an ISL field along with tag control information.
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False
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Standard IP access lists can filter network traffic based on the source and destination IP address and source and destination port number.
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False
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Switches operate at the Data Link layer as they filter traffic based on layer 2 information.
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True
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WRED is a congestion-avoidance mechanism.
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True
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StackWise can connect up to nine individual switches joined into multiple logical switching units and managed by one IP address.
answer
False. They are joined into one logical switching unit.
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The best definition of cloud computing is an on-demand computing model.
answer
True
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Which QoS mechanism is a 6-bit value that is used to describe the meaning of the layer 3 IPv4 ToS field?
answer
DSCP
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Southbound SDN interface are used between which two planes?
answer
Control, data
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Which QoS mechanism is a term that is used to describe a 3-bit field in the QoS control field of wireless frames?
answer
TID
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What are the three general ways to classify traffic?
answer
Markings, addressing, and application signatures
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CoS is a layer 2 QoS __________?
answer
Marking
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A session is using more bandwidth than allocated. Which QoS mechanism will drop the traffic?
answer
Policing
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What are the three SDN layers?
answer
Data, control, application
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What are two examples of newer queuing mechanisms that are recommended for rich-media networks?
answer
CBWFQ, LLW
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What is a layer 4 to 7 deep-packet inspection classifier that is more CPU-intensive than marking?
answer
NBAR
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______________ APIs are responsible for the communication between the SDN controller and the services running over the network.
answer
Northbound
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Voice traffic is real-time traffic and comprises constant and predictable bandwidth and packet arrival times. One-way requirements include latency < ___ms, jitter <__ms, and loss < _%, and bandwidth needs to be __-___ Kbps.
answer
150, 30, 1, 30-128
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On which SDN architecture layer does Cisco APIC-EM reside?
answer
Control
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The ________________ represents the core layer of the SDN architecture and is where the Cisco APIC-EM resides.
answer
Control plane
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In the IaaS service model, is the customer responsible for managing the operating system, software, platforms, and applications
answer
True
question
______________ provides only the network and delivers the computer infrastructure (platform virtualization environment).
answer
Infrastructure as a Service (IaaS)
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An IP phone is a common trust boundary.
answer
True
question
IP phones and the boundary between the ISP and enterprise network are common examples of trust boundaries.
answer
True
question
The IWAN allows transport-independent connectivity.
answer
True
question
Which advanced classification tool can be used to classify data applications?
answer
NBAR
question
The DSCP field constitutes how many fields in the IP header?
answer
6
question
Between which two planes are SDN southbound interfaces used?
answer
Control and data
question
_______________ is a term to describe designated fields in a frame or packet header. How devices treat packets in your network depends on the field values. __________ is usually used with Ethernet frames and contains 3 bits.
answer
Class of Service (CoS), Class of Service (CoS)
question
Which QoS mechanism will drop traffic if a session uses more than the allotted bandwidth?
answer
Policing
question
What are the three layers of the SDN architecture?
answer
Data, control, and application.
question
NBAR is a layer 4 to layer 7 deep-packet inspection classifier.
answer
True
question
Southbound APIs are used for communication between the controllers and network devices.
answer
True
question
OnePK is Cisco proprietary
answer
True
question
The Cisco switch stack is managed as a single object and has a single management IP address
answer
True
question
PaaS service provides the operating system and the network.
answer
True
question
IaaS service provides the required software, operating system, and the network.
answer
False. That's SaaS
question
When connecting to the cloud, you must do local backups on your PC.
answer
False
question
Which two states are the port states when RSTP has converged?
answer
Discarding, forwarding
question
Which two pieces of information are provided by the show controllers serial 0 command?
answer
The type of cable that is connected to the interface and the status of the physical layer of the interface
question
Which Cisco platform can verify ACLs?
answer
Cisco APIC-EM
question
Which type of switch ports drop packets with 802.1Q tags?
answer
Access ports
question
You enter the show ipv6 route command on a router and the device displays a route. What routing protocol is used?
answer
OSPFv3
question
Which switch states are valid for 802.1w?
answer
Discarding, learning, forwarding
question
What can cause collision domain issues on VLAN domain?
answer
Congestion on the switch inband path, BS duplex mismatches on Ethernet segments in the same VLAN
question
What is a benefit of switch stacking?
answer
It provides higher port density with better resource usage.
question
What protocol supports sharing the VLAN configuration between two or more switches?
answer
VTP
question
Which part of the PPPoE server configurator contains the information used to assign an IP address to a PPPoE client?
answer
Virtual Template Interface
question
What process is associated with spanning-tree convergence?
answer
Electing designated ports
question
Which type of interface can negotiate an IP address for a PPPoE client?
answer
Dialer
question
What is the purpose of traffic policing?
answer
It drops traffic that exceeds the CIR.
question
Which IEEE standard does PVST+ use to tunnel information?
answer
802.1q
question
Which version of SNMP first allowed user-based access?
answer
SNMPv1
question
What are two drawbacks of implementing a link-state routing protocol?
answer
The requirement for a hierarchical IP addressing scheme for optimal functionality, and high demand on router resources to run the link-state routing algorithm
question
What is a difference between TACACS+ and RADIUS in AAA?
answer
Only TACACS+ allows for separate authentication.
question
What is the default VLAN on an access port?
answer
VLAN 1
question
IP SLAs are used to determine the frequency of ICMP packets.
answer
True
question
What is a valid HSRP virtual MAC address?
answer
Look for the 07.AC in the address, such as: 0000.0C07.AC15.
question
Which feature can you use to monitor traffic on a switch by replicating it to another port or ports on the same switch?
answer
SPAN
question
Video traffic is passed with a well-known DSCP value of 46.
answer
True
question
What are two enhancements that OSPFv3 supports over OSPFv2?
answer
It can support multiple IPv6 subnets on a single link, and it routes over links rather than over networks.
question
Which protocol authenticates connected devices before allowing them to access the LAN?
answer
802 .1x
question
Describe slow inter-VLAN forwarding
answer
The local VLAN is working normally, but traffic to the alternate VLAN is forwarded more slowly than expected.
question
Intelligent DNS can redirect user requests to locations that are using fewer network resources.
answer
True
question
When a switch in rapid PVST+ mode has a topology change, the switch immediately deletes dynamic MAC addresses that were learned by all ports on the switch.
answer
False. It deletes all MAC addresses in that one VLAN instance.
question
Named ACLs support only extended ACLs.
answer
False
question
How can you disable DTP on a switch port?
answer
Change the operational mode to static access.
question
Which identification number is valid for an extended ACL?
answer
100-199
question
DTP uses the native VLAN to send data
answer
True
question
Which spanning-tree feature places a port immediately into a forwarding state?
answer
PortFast
question
Which type of topology is required by DMVPN?
answer
Hub-and-spoke
question
Which component of the Cisco SDN solution serves as the centralized management system?
answer
Cisco APIC
question
MPLS operates at what layer?
answer
It operates between layer 2 and layer 3.
question
What is the best way to verify that a host has a path to other hosts in different networks?
answer
Ping the default gateway.
question
Which EIGRP for IPv6 command can you enter to view the link-local addresses of the neighbors of a device?
answer
show ipv6 eigrp neighbors
question
What is the first step you perform to configure an SNMPv3 user?
answer
Configure the server group.
question
EIGRPv6 needs a RID under the routing process.
answer
True
question
When a device learns multiple routes to a specific network, it installs the route with
answer
lowest AD
question
Which protocol is the Cisco proprietary implementation of FHRP ?
answer
HSRP
question
Configuration of which option is required on a Cisco switch for the Cisco IP phone to work?
answer
the interface as an access port to allow the voice VLAN ID
question
Which function does IP SLA ICMP ECHO operation perform to assist with troubleshooting?
answer
packet-loss detection
question
What is the necessary component that is used to enable ipv6 routing ?
answer
loopback interface
question
A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20514560. Another route is from OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4. Which route or routes will the router install in the routing table?
answer
the EIGRP route
question
Which two statements about IPv6 and routing protocols are true?
answer
Link-local addresses are used to form routing adjacencies. OSPFv3 was developed to support IPv6 routing.
question
Which interface counter can you use to diagnose a duplex mismatch problem?
answer
late collisions
question
What are three characteristics of the TCP protocol?
answer
The connection is established before data is transmitted. It ensures that all data is transmitted and received by the remote device. It uses separate SYN and ACK messages to establish a connection.
question
During which phase of PPPoE is PPP authentication performed ?
answer
the PPP Session phase
question
Which three circumstances can cause a GRE tunnel to be in an up/down state?
answer
The tunnel interface is down. A valid route to the destination address is missing from the routing table. The tunnel address is routed through the tunnel itself.
question
Which two statements about wireless LAN controllers are true?
answer
They can simplify the management and deployment of wireless LANs They can manage mobility policies at a systemwide level
question
What IP SLA ICMP Echo measures?
answer
Packet loss
question
Which spanning-tree protocol rides on top of another spanning-tree protocol?
answer
MSTP
question
Which statement about LLDP is true?
answer
It is configured in global configuration mode.
question
The network administrator cannot connect to Switch 1 over a Telnet session, although the hosts attached to Switch1 can ping the interface Fa0/0 of the router. Given the information in the graphic and assuming that the router and Switch2 are configured properly, which of the following commands should be issued on Switch1 to correct this problem?
answer
Switch1(config)# ip default-gateway 192.168.24.1
question
Which command can you enter to verify that a 128-bit address is live and responding?
answer
show ipv6
question
What are two benefits of using NAT?
answer
NAT eliminates the need to re-address all hosts that require external access. NAT protects network security because private networks are not advertised.
question
Which value to use in HSRP protocol election process ?
answer
priority
question
What field is consist of 6 bytes in the field identification frame in IEEE 802.1Q ?
answer
SA
question
Which feature is config by setting a variance that is at least 2 times the metric ?
answer
unequal cost load balancing
question
In which byte of an IP packet can traffic be marked ?
answer
the ToS byte
question
Which three options are switchport config that can always avoid duplex mismatch error between the switches?
answer
set both side on auto-negotation. set both sides on half-duplex set both side of connection to full-duplex
question
What are two benefits of Private IPv4 Addresses?
answer
they can be implemented without requiring admin to coordinate with IANA provide network isloation from the internet
question
Which two options describe benefits of aggregated chassis technology
answer
it reduces management overhead. it requires only 1 IP add per VLAN.
question
Which utility can you use to identify redundant or shadow rules ?
answer
The ACL analysis tool in Cisco APIC-EM.
question
What is known as ―one-to-nearest addressing in IPv6 ?
answer
anycast
question
Which major component of the network virtualization architecture isolate users according to policy?
answer
network access control
question
How does NAT overloading provide one-to-many address translation?
answer
assigns a unique TCP/UDP port to each session
question
At the end of an RSTP election process, which access layer switch port will assume the discarding role?
answer
Switch3, port Gi0/2
question
Which utility can you use to identify the cause of a traffic-flow blockage between the two devices in a network?
answer
ACL analysis tool in APIC-EM
question
When you troubleshoot an IPv4 connectivity issue on a router, which three router configuration checks you must perform?
answer
Verify that the router interface IP address is correct. Verify that the router and the host use the same subnet mask. Verify that the route appears in the Routing table
