Network+ Chapter 4

At which OSI layer does IP operate? Transport layer Application layer Data Link layer Network layer

network layer

A routing protocol's reliability and priority are rated by what measurement? AD Routing table MTU Latency

AD

List three IGPs (interior gateway protocols).

RIP/RIPv2, IS-IS, OSPF

Which protocol is supported by ICMPv6 to facilitate neighbor discovery on an IPv6 network?

NDP (Neighbor Discovery Protocol)

What field in a TCP segment is used to determine if an arriving data unit exactly matches the data unit sent by the source? Checksum DiffServ Acknowledgment number Source port

checksum

What is the difference between dynamic ARP table entries and static ARP table entries?

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.

When a router can't determine a path to a message's destination, where does it send the message? Gateway of last resort Default gateway Administrative distance Routing table

gateway of last resort

Which OSI layer is responsible for directing data from one LAN to another? Physical layer Network layer Transport layer Data Link layer

network layer

Which Linux utility provides output similar to Wireshark's?

tcpdump

What kind of route is created when a network administrator configures a router to use a specific path between nodes? Best path Trace route Default route Static route

static route

Which two fields in an Ethernet frame help synchronize device communications but are not counted toward the frame's size?

Preamble and SFD

What three characteristics about TCP distinguish it from UDP?

TCP is connection-oriented, uses sequencing and check-sums, and provides flow control.

What process is used to establish a TCP connection?

TCP uses a three-way handshake.

Give three examples of routing metrics used by routers to determine the best of various available routing paths.

(Any three) Hop count, theoretical bandwidth, actual throughput, path latency (or delay), path load, MTU, cost, reliability

What four functions do all routers perform?

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.

What is the Internet standard MTU? 65,535 bytes 1,522 bytes 1,500 bytes 9,198 bytes

1500 bytes

Which routing protocol does an exterior router use to collect data to build its routing tables? OSPF IP RIPv2 BGP

BGP

Which two protocols manage neighbor discovery processes on IPv4 networks? BGP and OSPF IPv4 and IPv6 ICMP and ARP TCP and UDP

ICMP and ARP

What database does a router consult before determining the most efficient path for delivering a message?

Its routing table.

Which protocol's header would a Layer 4 device read and process? HTTP ARP TCP IP

TCP