Networking 100 chapter 6,7,8, 10
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Which unit is used to measure signal loss in networking?
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Decibel (dB)
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A 2U rack-mounted server measures 7 inches.
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false
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If you suspect that a fiber-optic run has a break, which type of device would you use to determine if there is a break, and to identify the location of the break?
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Optical time domain reflectometer (OTDR)
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The __________ standard covers proper labeling and documentation of cabling, patch panels, and wall outlets.
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. TIA/EIA 606
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If you provide support for, but do not install, UTP networks, which two tools are most important to use?
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Good, medium-priced toner and a good, medium-priced cable tester
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Installing structured cabling properly takes a startlingly high degree of skill.
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true
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What type of tool is manufactured by Tripplet Corporation and is called a ?Fox and Hound??
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toner
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Which term describes the cabling that goes more or less horizontally from a work area to the telecommunications room?
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Horizontal cabling run
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Which item is part of a wall outlet?
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A female jack
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Which statement is true regarding standard equipment racks?
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They provide safe platforms for all the different components.
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If Windows installs the driver for a NIC, you should use it rather than using a driver that comes from the manufacturer of the NIC.
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False
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When crimping an RJ-45 onto a UTP cable, be sure to slide each boot onto the patch cable after you crimp both ends.
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false
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What is the norm today for the number of pairs in UTP cabling?
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four
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Which characteristic applies to stranded core cabling?
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Stranded core contains a bundle of tiny wire strands.
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What are the three essential ingredients for a successful implementation of a basic structured cabling network?
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A telecommunications room, horizontal cabling, and a work area
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A standby power supply is always on and powers the system while the battery charges.
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False
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Which device provides the benefit of acting like an inverter?
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Uninterruptible power supply (UPS)
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A generator provides enough power for you to continue working in the event of a power failure.
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true
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Female RJ-45 jacks used in work area wall outlets typically have CAT ratings.
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False
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What item do most professional cable installers use to quote the price for an installation?
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The number of drops
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One reason to run cabling inside the walls as opposed to outside the walls is that it is __________.
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looks neater
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When testing for continuity using a multimeter set to Ohms, if you have a connection you will see a(n) __________ reading.
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. zero Ohms
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Attenuation is the weakening of a signal as it travels long distances.
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False
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Which item is part of a wall outlet?
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A female jack
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What type of expansion slot can you expect to see in most desktop PCs today (excluding laptops)?
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PCIe
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The PCIe expansion slot __________.
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. has a variation known as PCIe x2
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Which type of link light is found on older NICs?
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Collision
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What type of connector is used by all UTP Ethernet NICs?
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RJ-45
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Which statement is true regarding standard equipment racks?
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They provide safe platforms for all the different components.
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Ideally, once you install horizontal cabling, you should never move it.
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true
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A 2U rack-mounted server measures 7 inches
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false
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Within a Windows OS, which tool can you use to verify that Windows recognizes a NIC and is ready to use it?
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Device Manager
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What are you trying to discover when you test a cable for continuity?
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A broken wire
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Which NIC light turns on when the card detects network traffic and intermittently flickers when operating properly?
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Activity light
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If you want to be a purist when labeling the connections on patch panels, there is an official, and rather confusing, TIA/EIA labeling methodology called TIA/EIA 606.
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True
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What is a typical cost of a network cable installation?
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$150 per drop
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Female RJ-45 jacks used in work area wall outlets typically have CAT ratings.
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False
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Patch panels allow you to connect only one kind of cabling; that is, they support only UTP, STP, or fiber, but not a mixture of different types.
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False
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What is the maximum length for UTP cables allowed by the TIA/EIA 568 cabling specification?
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90 meters
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If Windows installs the driver for a NIC, you should use it rather than using a driver that comes from the manufacturer of the NIC.
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False
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What item do most professional cable installers use to quote the price for an installation?
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The number of drops
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Which formula would you use to arrive at the number of hosts on a subnet?
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2x ? 2, where x represents the number of zeroes in the subnet mask
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Which IP address is valid for an individual host expressed in dotted decimal notation?
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215.233.32.91
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IP is a Transport layer protocol.
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False
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UDP is a connection-oriented protocol
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False
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Which tool automatically assigns an IP address whenever a computer connects to the network?
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DHCP
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Which protocol is connection-oriented
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TCP
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Which port is used to receive e-mail messages from e-mail servers (POP3)?
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110
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What are the two names for dynamic IP addressing?
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Bootstrap Protocol (BOOTP) and Dynamic Host Configuration Protocol (DHCP)
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Which protocol uses TCP as its transport layer protocol?
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http
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What command can you use to tell a device to send packets to itself?
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ping 127.0.0.1
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What is the de facto protocol suite of the Internet?
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TCP/IP
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Which task is performed by an ISP when it takes a block of addresses, subnets the block into multiple subnets, and then passes out the smaller individual subnets to customers?
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Classless Inter-Domain Routing (CIDR)
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The first binary octet of a Class C IP address always begins with 110 (110xxxxx).
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true
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What is the range of decimal values in each of the four groups of an IPv4 address?
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0 to 255
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Which formula would you use to calculate the number of new subnets?
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2y, where y is the number of bits you add to the subnet mask
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What tool is used to overcome the limitations inherent in TCP/IP Ethernet networks?
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IP addressing
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TCP chops up data into segments.
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true
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Which subnet mask is an example of classless subnetting?
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255.255.240.0
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What network protocol do Apple systems use today?
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TCP/IP
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When a DHCP client boots up, it automatically sends out a special DHCP Discover packet using the broadcast address.
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true
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UDP is a connection-oriented protocol.
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False
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The Link layer is where most of the activity happens in the TCP/IP protocol suite.
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False
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You can have 256 hosts on a /24 network.
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False
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What is the default subnet mask for a Class C network?
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255.255.255.0
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What command would you run from a Windows command line to test a computer?s network stack?
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ping 127.0.0.1
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Not only does DHCP give out IP addresses, it can also give out additional information, such as your default gateway, DNS server, and Network Time server.
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TRUE
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On a Linux system, you can renew a DHCP address by using the command ipconfig /renew.
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FALSE
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Which statement about subnet masks is true?
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All machines on the same network have the same subnet mask.
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Which protocol do Domain Name System (DNS) and Dynamic Host Configuration Protocol (DHCP) use?
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UDP
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Domain Name System (DNS) uses UDP.
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TRUE
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if the first decimal value of an IP address is between 128 and 191, to what IP class does the network belong?
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CLASS B
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Class C network block uses the __________ octets to define only the network ID.
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first three
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The part of the IP address that is the same for all computers on a network is called the host ID.
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False
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Subnetting makes it difficult to separate a network for security purposes.
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FALSE
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How long is a subnet mask?
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32 BITS
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What is the cornerstone of subnetting?
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IP address
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Suppose your network subnet mask is 255.255.0.0. What is the maximum number of host IDs available for this network?
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65534
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The addresses 127.0.0.1, 10.1.1.50, 172.16.200.1, and 192.168.35.44 are all examples of ________.
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special IP addresses
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If the first decimal value of an IP address is between 128 and 191, to what IP class does the network belong?
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Class B
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Subnet masks are always 32 binary digits long.
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true
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Which of the following is a designated private IP address?
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10.164.19.5
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Which port do Web servers use?
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80
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To what layer of the OSI model does the TCP/IP model?s Internet layer correspond?
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Network
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When a computer gives itself an Automatic Private IP Address (APIPA), it also includes a valid default gateway address.
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False
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What is the universal MAC address for broadcast?
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FF-FF-FF-FF-FF-FF
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Which vector routing protocol is the oldest?
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RIP
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Routing table entries are entered manually on static routers and do not change.
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TRUE
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By convention, what is the name given to Area ID 0 (zero) of an Open Shortest Path First (OSPF) network?
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Backbone
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Which value represents the core or backbone area of an OSPF network?
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0.0.0.0
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What is the name of the proprietary cable designed by Cisco for connecting to their routers?
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yOST
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Which protocol is used on the Internet for communication between Autonomous Systems?
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Border Gateway Protocol (BGP-4)
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RIP converges dramatically faster and is much more efficient than OSPF.
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False
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Which column in a routing table tells the router which of its ports to use?
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Interface
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With distance vector routing protocols, the simplest total cost sums the hops (the hop count) between a router and a network.
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TRUE
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Which protocol is a distance vector routing protocol?
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IS-IS
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What is the name of Cisco?s proprietary operating system?
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Cisco IOS
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Every brand of router tends to use the same default user name and password.
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TRUE
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The Border Gateway Protocol is used between routers inside a single Autonomous System.
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FALSE
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Which tool can be used to access a Cisco router remotely from a Windows 7 system?
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. PuTTY
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Your company has a single server on the private LAN that it wants to make accessible from the Internet. Which of the following would give the server the protection of NAT, while allowing access to that server from the Internet?
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Port forwarding
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__________ maps a single routable (that is, not private) IP address to a single machine, enabling you to access that machine from outside the network.
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Static NAT
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Network Address Translation (NAT) extended the useful life of IPv4 addresses on the Internet for many years.
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True
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What protocol was adopted in 1994, and is now considered obsolete except for small, private WANs?
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RIPv2
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Which routing metric determines the largest frame a particular technology can handle?
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MTU
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The protocol used by Autonomous Systems to communicate with each other is generically called a(n) __________.
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Exterior Gateway Protocol (EGP)
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NAT is essentially the same process as routing.
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false
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Which routing protocol is the choice in most large enterprise networks?
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EIGRP
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Which routing protocol does not support Variable-Length Subnet Masking (VLSM)?
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RIPv1
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Which term refers to the passage of a packet through a router?
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Hop
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What is the maximum number of hops allowed by RIP?
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15
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What tasks should be performed as soon as an administrator finishes configuring a router?
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Document how you configured the router and back up the router configuration.
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Which of the following could be a valid Autonomous System Number (ASN)?
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1.33457
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Which tool is used by an administrator to manage many routers and obtain an overall view of all the routers?
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Network Management System (NMS)
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Secure Shell (SSH) is a terminal emulation program that uses the network to connect routers.
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true
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Which NAT technology uses port numbers to map traffic from specific machines on the network?
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PAT
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The first thing you should do with a new router is to plug it into an existing network.
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False
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On a TCP/IP network, a router determines where an incoming packet should go by looking at the packet?s
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destination IP addresses
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Routers work with the source IP address of each packet.
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False
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Which tool records the route between any two hosts on a network and can be used to troubleshoot routing problems?
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traceroute
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Which protocol is a path vector routing protocol?
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BGP
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Which routing metric refers to the ability of a connection to handle more data than others?
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Bandwidth
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Every node on a network has a routing table.
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True
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Which protocol is Cisco?s proprietary protocol?
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EIGRP
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Which form of NAT typically handles the one-to-many connections?
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Port Address Translation (PAT)
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What is another name for dynamic NAT?
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Pooled NAT
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When a router has more than one route to the same network, the responsibility for assigning a different metric for each route lies with the __________.
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person in charge of that router
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At which layer of the OSI model do routers work?
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Network
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Which protocol is a link state dynamic routing protocol?
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IS-IS
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With NAT, the router replaces the destination IP address of a computer with its outside interface address on outgoing packets.
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False
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Every operating system always looks first in the hosts file before anything else when attempting to resolve a name.
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True
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A Windows domain is the same as a DNS domain.
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False
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Which item is part of a fully qualified domain name (FQDN)?
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. The host name
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Which zone files are the most important part of any DNS server?
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Forward lookup zones
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Which statement is true about DNS roots?
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They have the complete definitive name resolution table.
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Which command is used to force a DNS server to update its records?
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ipconfig /registerdns
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On an authoritative DNS server, which storage areas hold the IP addresses and FQDNs for the computers in a domain?
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Forward lookup zones
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A single DNS domain may have a single authoritative DNS server and only one other DNS server, known as a name server (NS).
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False
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What term best describes the way the DNS name space is organized?
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Hierarchical
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What entry is made at the command prompt in UNIX/Linux to display DNS server information?
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cat /etc/resolv.conf
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Which protocol enables DNS servers to get automatic updates of IP addresses of computers in their forward lookup zones, mainly by talking to the local DHCP server?
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Dynamic DNS
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Within the DNS hierarchy, which term refers to the DNS servers just below the DNS root?
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Top-level domain servers
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How many powerful DNS server clusters, scattered all over the world, does the DNS root contain?
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13
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Which zone is created on other DNS servers to act as backups to the primary zone?
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Secondary
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A zone is a container for multiple DNS domains.
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False
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Lots of operating systems come with built-in DNS server software, including Windows Server.
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true
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Which DNS server is used to talk to other DNS servers to resolve IP addresses for DNS clients?
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Authoritative server
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A single DNS server can act as the authoritative DNS server for only one domain.
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false
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Every forward lookup zone requires a Start of Authority (SOA) record.
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true
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The top level of a domain name registered for Internet use is the name of the individual entity registering the domain name.
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true
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DNS domains that are not on the Internet should use the top-level name __________.
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.local
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Which term is an original top-level domain name?
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.mil
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In the DNS naming convention, what character(s) separate(s) a domain name from its subdomains?
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Period (.)
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How is the address 127.0.0.1 listed in the hosts file?
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localhost
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Which type of domain allows all of the domain controllers to be equal partners, such that any domain controller can take over if one domain controller fails?
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Active Directory
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Which record type points to the authoritative name server?
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SOA
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Including the separating periods, what is the maximum number of characters allowed by the DNS naming convention?
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255
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On a private TCP/IP network, the DNS naming convention does not require top-level domain names such as .com or .org.
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True
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Every Web server must include ?www? as part of its name.
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False
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How does NetBIOS identify a computer system on the network?
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By using a NetBIOS name
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As the Internet has grown, hosts files have replaced DNS.
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False
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Which of the following is true of the names in a flat name space?
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Names must be unique.
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What UDP port do DNS servers primarily use?
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53
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Which tool is the best choice for testing DNS?
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ping
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In comparing the DNS name space to a computer?s file system, a domain is like __________.
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a folder
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If a primary DNS server goes down, the secondary servers can resolve FQDNs and add new records.
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false
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If you want to be a purist when labeling the connections on patch panels, there is an official, and rather confusing, TIA/EIA labeling methodology called TIA/EIA 606.
answer
True
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What are you trying to discover when you test a cable for continuity?
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A broken wire
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The network status icon in the Notification Area in Windows 7 will display a little red ? when a NIC is disconnected.
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True
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What is the size of a U, the equipment rack unit of measure, used for specifying height?
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1.75 inches
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Which condition specifically applies to UTP cabling?
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Uninterruptible power supply (UPS)
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What type of tool is manufactured by Tripplet Corporation and is called a ?Fox and Hound??
answer
Toner
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Which attribute applies to the OSPF routing method?
answer
It uses a link state algorithm.
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Every node on a network has a routing table.
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True
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What enables a system to determine an FQDN by knowing the IP address?
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Reverse lookup zones
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Which of the following would confirm that you have a DNS problem?
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Ping works with the IP address but not with the Web site name.
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Cache-only DNS servers are often the authoritative server for a domain.
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False
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Most switches enable you to use multiple NICs for a single machine, a process called __________ or link aggregation.
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bonding
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If a routing table has two or more valid routes for a particular IP address destination, it always chooses the route with the highest value.
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False
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Which organization has the authority to create new top-level domain names?
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ICANN
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A DNS server must be a member of a domain to be a name server for that domain.
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False
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Which protocol enables DNS servers to get automatic updates of IP addresses of computers in their forward lookup zones, mainly by talking to the local DHCP server?
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Dynamic DNS
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Microsoft used DNS names with the __________ protocol to provide folder and printer sharing in small TCP/IP networks.
answer
SMB
