English FormC ENetwork v40 Chapter 2Word文档下载推荐.docx

English FormC ENetwork v40 Chapter 2Word文档下载推荐.docx

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Observable

Description

MaxValue

1

correctnessofresponse

Option1,Option3,andOption5arecorrect.

1pointforeachcorrectoption.

0pointsifmoreoptionsareselectedthanrequired.

3

∙2.3.2NetworkProtocols

∙2.4.1TheBenefitsofUsingaLayeredModel

∙2.4.6TheSendingandReceivingProcess

Selectthestatementsthatarecorrectconcerningnetworkprotocols.（Choosethree.）

definethestructureoflayerspecificPDU'

s

dictatehowtoaccomplishlayerfunctions

outlinethefunctionsnecessaryforcommunicationsbetweenlayers

limittheneedforhardwarecompatibility

requirelayerdependentencapsulations

eliminatestandardizationamongvendors

∙2.2.4NetworkRepresentations

Whataretwofunctionsofencapsulation?

（Choosetwo.）

tracksdelaybetweenenddevices

enablesconsistentnetworkpathsforcommunication

allowsmodificationoftheoriginaldatabeforetransmission

identifiespiecesofdataaspartofthesamecommunication

ensuresthatdatapiecescanbedirectedtothecorrectreceivingenddevice

Option4andOption5arecorrect.

2

∙2.4.7TheOSIModel

Whatisaprimaryfunctionofthetrailerinformationaddedbythedatalinklayerencapsulation?

supportserrordetection

ensuresorderedarrivalofdata

providesdeliverytocorrectdestination

identifiesthedevicesonthelocalnetwork

assistsintermediarydeviceswithprocessingandpathselection

2pointsforOption1

0pointsforanyotheroption

∙2.4.8ComparingtheOSIModelwiththeTCP/IPModel

WhichtwolayersoftheOSImodelhavethesamefunctionsastheTCP/IPmodelNetworkAccessLayer?

Network

Transport

Physical

DataLink

Session

Option3andOption4arecorrect.

∙2.3.3ProtocolSuitesandIndustryStandards

WhatisaPDU?

corruptionofaframeduringtransmission

datareassembledatthedestination

retransmittedpacketsduetolostcommunication

alayerspecificencapsulation

2pointsforOption4

∙2.1.4EndDevicesandtheirRoleontheNetwork

Whichcharacteristiccorrectlyreferstoenddevicesinanetwork?

originatedataflow

2pointsforOption2

∙2.1.5IntermediaryDevicesandtheirRoleontheNetwork

Refertotheexhibit."

CellA"

atIPaddress10.0.0.34hasestablishedanIPsessionwith"

IPPhone1"

atIPaddress172.16.1.103.Baseduponthegraphic,whichdevicetypebestdescribesthefunctionofwirelessdevice"

CellA?

"

thedestinationdevice

anenddevice

anintermediatedevice

amediadevice

∙2.2.2WideAreaNetworks

Refertotheexhibit.Whichthreelabelscorrectlyidentifythenetworktypesforthenetworksegmentsthatareshown?

NetworkA--WAN

NetworkB--WAN

NetworkC--LAN

NetworkB--MAN

NetworkC--WAN

NetworkA--LAN

Option2,Option3,andOption6arecorrect.

WhichthreestatementsbestdescribeaLocalAreaNetwork（LAN）?

ALANisusuallyinasinglegeographicalarea.

Thenetworkisadministeredbyasingleorganization.

TheconnectionbetweensegmentsintheLANisusuallythroughaleasedconnection.

Thesecurityandaccesscontrolofthenetworkarecontrolledbyaserviceprovider.

ALANprovidesnetworkservicesandaccesstoapplicationsforuserswithinacommonorganization.

EachendofthenetworkisgenerallyconnectedtoaTelecommunicationServiceProvider（TSP）.

Option1,Option2,andOption5arecorrect.

∙2.3.1RulesthatGovernCommunications

Refertotheexhibit.Whichnetworkingtermdescribesthedatainterleavingprocessrepresentedinthegraphic?

piping

PDU

streaming

multiplexing

encapsulation

∙2.5.4GettingtheDatatotheRightApplication

WhatistheprimarypurposeofLayer4portassignment?

toidentifydevicesonthelocalmedia

toidentifythehopsbetweensourceanddestination

toidentifytotheintermediarydevicesthebestpaththroughthenetwork

toidentifythesourceanddestinationenddevicesthatarecommunicating

toidentifytheprocessesorservicesthatarecommunicatingwithintheenddevices

2pointsforOption5

Whatdeviceisconsideredanintermediarydevice?

fileserver

IPphone

laptop

printer

switch

Refertotheexhibit.WhichtermcorrectlyidentifiesthedevicetypethatisincludedintheareaB?

source

end

transfer

intermediary

∙2.2.1LocalAreaNetworks

Refertotheexhibit.Whattypeofnetworkisshown?

WAN

MAN

LAN

WLAN

2pointsforOption3

∙2.4.5ProtocolDataUnitsandEncapsulation

Whichlayerencapsulatesthesegmentintopackets?

physical

datalink

network

transport

∙2.5.3GettingtheDatathroughtheInternetwork

Whatcanbeidentifiedbyexaminingthenetworklayerheader?

thedestinationdeviceonthelocalmedia

thedestinationhostaddress

thebitsthatwillbetransferredoverthemedia

thesourceapplicationorprocesscreatingthedata

Refertotheexhibit.Whichsetofdevicescontainsonlyenddevices?

A,C,D

B,E,G,H

C,