NT1210 Final – Flashcards
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To identify where wireless devices, such as APs, should be placed in the network, you should do what kind of test?
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Site Survey Network Tap Boot Message
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What does the WiFi Alliance do?
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promotes Wi-Fi technology and certifies Wi-Fi products if they conform to certain standards
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A company installs an 802.11g AP to rive its employee's wireless access from their cubicles. Carl's cubicle is 40 feet from the AP, Paul's is 20 feet, and Mark's is 100 feet. Which access is slower?
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Marks
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Omnidirectional antennas broadcast in what directions?
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in all directions
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What is a dedicated circuit?
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ensure that heavy duty appliances receive the electrical current they need without overloading
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What layer of the TCP/IP model do routers belong in?
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NETWORK LAYER 3
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What is the point called where the Smart Jack on the Customer side interfaces with the Smart Jack on the Telco side?
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Demarc
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What is SONET WAN technology?
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one of several key technologies often found in a WAN. SONET - Synchronous Optical Network is an international standard for high speed communication over fiber-optic networks. The SONET establishes Optical Carrier (0C) levals from 51.8 Mbps to 10 Gbps (0C-192) or even higher. SONET provides high speed connectivity over the network. Standard for physical cable
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What is a byte?
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A series of 8 bits.
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What do parentheses do in mathematical equations?
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state which operation to do first.
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What physical topologies have the inherent weakness of a single point of failure?
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Star Network Hub & Spoke Topology
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What is basic to every networking standard?
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Details of what a networking technology does
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Why is the TCP/IP model divided into layers?
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To make it easier to understand how networks work, write protocols for networks, and to create standards for networks...Troubleshooting
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Which layer of the OSI model is responsible for encryption and compression?
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Presentation (Layer 6)
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What is closed electrical circuit?
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An electric circuit providing an uninterrupted, endless path for the flow of current.
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What is a network-encoding scheme?
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A set of rules that define how to change the pattern of the waveforms of energy to represent binary 0's and l's
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What causes full duplex to transmit and receive simultaneously?
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two pairs of wires for the connection, one to send and one to receive.
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What is UTP Max Distance?
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100 meters or a little bit over 300 feet
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What is the Ethernet Standard?
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IEEE 802.3 standard
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What do Ethernet "bit rate" as defined by IEEE standards mean?
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The number of bits sent in a second over some link.
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Which pair of wires does UTP cable use to transmit and receive data?
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1 and 2 sends & 3 and 6 receives
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Which is the primary function of the IP protocol?
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delivering packets from the source host to the destination host solely based on the IP addresses in the packet headers.
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What do dynamic routing protocols do?
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they allow routers to learn how to routenetwork packets more efficiently
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Which are the IP Classes?
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Class A 1.0.0.1 to 126.255.255.254 Class B 128.1.0.1 to 191.255.255.254 Class C 192.0.1.1 to 223.255.254.254 Class D 224.0.0.0 to 239.255.255.255 Class E 240.0.0.0 to 254.255.255.254
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Which IP protocol is designed to dynamically assign IP addresses to devices on a LAN?
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Dynamic Host Control Protocol (DHCP),
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Given an IP address of 172.16.5.5 with a subnet mask of 255.255.255.192, what is the LAST assignable IP address available on the 10th network?
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172.16.2.126
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What dose Transport Layer protocols do for Application Layer protocols?
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Identify the destination application with a number called a port number.
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What is a port number used for?
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part of the addressing information used to identify the senders and receivers of messages.
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What is the "well-known" port number range?
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Port numbers range from 0 to 65536, but only ports numbers 0 to 1024 are reserved for privileged services and designated as well-known ports
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What is TCP segmentation?
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It reduces the CPU overhead required by TCP communications and improves network I/O performance.
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What is the SEQ field is used for in TCP packets?
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label the first byte data so that receiving computer can signal rather the receiving computer successfully received the segment (packet).
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What happens if a TCP segment is not received by the destination?
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It acknowledges the data it received up to the point the sequence was broken TCP would request that sequence would be re-sent at the point of the break-up.
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What is UDP?
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User Datagram Protoco
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What are the source and destination application ports?
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80 - HTTP 21 23
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IP addresses are divided into two parts: the network identifier and the identifier.
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the network identifier and the Host identifier
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What is the term for the part of the Internet between an ISP and the ISP customer?
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Internet Edge
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What device is typically found near the Internet edge and offers security services for the network?
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IPS (Intrusion Prevention System)
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What is an Internet core?
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The Internet backbone refers to the principal data routes between large, strategically interconnected networks and core routers on the Internet.
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What technique does a cable provider use to allow video and data transmissions on the same piece of coaxial in a customer's home?
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FDM Frequency Division Multiplexing... UTP coaxial cable broadband
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What is the difference between public and private IP addresses?
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Public and private IP (Internet Protocol) addresses ... sometimes called "external" and "internal" IP addresses ... both exist for the same reason: to provide unique identification to every device on a network.
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Why was CIDR developed?
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to slow the growth of routing tables on routers across the Internet, and to help slow the rapid exhaustion of IPv4 addresses.
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Why was NAT developed?
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ability to allow multiple computers to connect to an external network through a single external IP address
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What is CIDR?
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Classless Inter-Domain Routing is a method for allocating IP addresses and routing Internet Protocol packets
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What is private IP network?
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An IP address within one of three ranges (10.x.x.x, 192.168.x.x, 172.16.0.0 - 172.31.255.255
