Ch 4: Chapter Review Questions

11 September 2022
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question
Which protocol's header would a Layer 4 device read and process? a. IP b. TCP c. ARP d. HTTP
answer
b. TCP
question
What field in a TCP segment is used to determine if an arriving data unit exactly matches the data unit sent by the source? a. Source port b. Acknowledgement number c. DiffServ d. Checksum
answer
d. Checksum
question
At which OSI layer does IP operate? a. Application layer b. Transport layer c. Network layer d. Data Link layer
answer
c. Network Layer
question
Which OSI layer is responsible for directing data from one LAN to another? a. Transport layer b. Network layer c. Data Link layer d. Physical layer
answer
b. Network Layer
question
What kind of route is created when a network administrator configures a router to use a specific path between nodes? a. Trace route b. Static route c. Default route d. Best path
answer
b. Static route
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When a router can't determine a path to a message's destination, where does it send the message?a. Default gateway b. Routing table c. Administrative distance d. Gateway of last resort
answer
d. Gateway of last resort
question
A routing protocol's reliability and priority are rated by what measurement? a. Routing table b. MTU c. Latency d. AD
answer
d. AD
question
Which routing protocol does an exterior router use to collect data to build its routing tables? a. RIPv2 b. BGP c. OSPF d. IP
answer
b. BGP
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What is the Internet standard MTU? a. 65,535 bytes b. 1,522 bytes c. 1,500 bytes d. 9,198 bytes
answer
c. 1,500 bytes
question
Which two protocols manage neighbor discovery processes on IPv4 networks? a. ICMP and ARP b. IPv4 and IPv6 c. TCP and UDP d. BGP and OSPF
answer
a. ICMP and ARP
question
What three characteristics about TCP distinguish it from UDP?
answer
TCP is connection-oriented, uses sequencing and checksums, and provides flow control.
question
What process is used to establish a TCP connection?
answer
Three-way handshake
question
What is the difference between dynamic ARP table entries and static ARP table entries?
answer
Dynamic ARP table entries are created when a client makes an ARP request, whereas static ARP table entries are entered manually using the ARP utility.
question
Which two fields in an Ethernet frame help synchronize device communications but are not counted toward the frame's size?
answer
Preamble and SFD
question
What four functions do all routers perform?
answer
*1.* Connect dissimilar networks. *2.* Interpret Layers 3 and 4 addressing and other information. *3.* Determine the best path for data to follow. *4.* Reroute traffic if a primary path is down but another path is available.
question
What database does a router consult before determining the most efficient path for delivering a message?
answer
Its routing table
question
Give three examples of routing metrics used by routers to determine the best of various available routing paths.
answer
(Any three) Hop count, theoretical bandwidth, actual throughput, path latency (or delay), path load, MTU, cost, reliability, network topology
question
List three IGPs (interior gateway protocols).
answer
Any three) RIP, RIPv2, OSPF, IS-IS, EIGRP
question
Which protocol is supported by ICMPv6 to facilitate neighbor discovery on an IPv6 network?
answer
NDP (Neighbor Discovery Protocol)