緒論單元測(cè)試本課程采用“自頂向下”的方式講解計(jì)算機(jī)網(wǎng)絡(luò)原理。

A:錯(cuò)

B:對(duì)

答案:B第一章測(cè)試Thewebserverisnotanendsystem?

A:錯(cuò)

B:對(duì)

答案:ATheupperlayersoftheOSImodelare()incorrectorder.

A:Session,presentation,application

B:Session,application,presentation

C:Application,presentation,session

D:Session,application,presentation,physical

答案:AThelowerlayersoftheOSImodelare()incorrectorder.

A:physical,transport,network,datalink

B:physical,datalink,network,transport

C:physical,system,network,logical

D:physical,logical,system,network

答案:BTheInternetProtocol(IP)generallycorrespondstowhichOSIlayer?

A:Network(layerthree)

B:Transport(layerfour)

C:Datalink(layertwo)

D:Session(layerfive)

答案:AWhichofthesenetworkdevicesprimarilyfunctionsattheOSINetworklayer(layer3)?

A:Gateway

B:Router

C:Alloftheabove

D:Switch

答案:B第二章測(cè)試TCPisanapplicationlayerprotocol.

A:錯(cuò)

B:對(duì)

答案:AWhichisnotanapplicationlayerprotocol?()

A:ARP

B:FTP

C:HTTP

D:DNS

答案:ATheonlyarchitectureofapplicationsispeer-to-peer.

A:錯(cuò)

B:對(duì)

答案:AIntheclient-serverarchitecture,theclientsisnotalwayson.

A:對(duì)

B:錯(cuò)

答案:AMailserverportnumberis()

A:81

B:25

C:403

D:80

答案:B第三章測(cè)試ThePOP3protocolrunsover____andusesport____.

A:TCP25

B:UDP25

C:UDP110

D:TCP110

答案:D____ismostusedforerrorreporting.

A:FTP

B:SMTP

C:UDP

D:ICMP

答案:DInthefollowingoptions,whichdoesnotuseUDP?

A:streamingmultimedia

B:videoconferencingS

C:telnet

D:Internetphone

答案:CInternettransport-layerprotocolsincludeTCP,IPandUDP.

A:錯(cuò)

B:對(duì)

答案:ATCPsenderperceivecongestionthroughatimeouteventorareceivingduplicateACK-sevent.

A:對(duì)

B:錯(cuò)

答案:A第四章測(cè)試RARPprotocoltranslatesIPaddressesintoMACaddresses.

A:對(duì)

B:錯(cuò)

答案:BThePINGcommandisimplementedbytheICMPechorequest/reply.

A:錯(cuò)

B:對(duì)

答案:BAnIPaddressconsistsofanetworknumberfieldandahostnumberfield.

A:錯(cuò)

B:對(duì)

答案:BThemaintaskoftheInternet’sDomainNameSystem(DNS)isto:

A:Provideanauthorityforregisteringdomainnames

B:Translatemnemonic（記憶的）namestoIPaddresses

C:SpecifythestandardsforInternetdomainnames

D:TranslateportnumberstoIPaddresses

答案:BTheInternet’snetworklayerisresponsibleformovingnetwork-layerpacketsknownas()fromonehosttoanother.

A:segment

B:frame

C:message

D:datagram

答案:D第五章測(cè)試MACaddressisuniqueintheworld.

A:對(duì)

B:錯(cuò)

答案:AA16-portswitch,eachportis10/100Mfull-duplexadaptive,thenbusbandwidthoftheswitchis()

A:10M

B:1.6G

C:100M

D:3.2G

答案:CTheswitchreceivesaframewhosetargeaddresscannotbefoundinitsMACaddresstable,thenswitchwilldo()

A:discard

B:forward

C:sendback

D:flooding

答案:DWhatistrueoftheARPtableinthefollowingdescriptionis?

A:errordetection

B:mappingofIPaddresstoMACaddress

C:routingselection

D:reducenetworktraffic

答案:BWhichlayerdoestheswitchworkon?

A:transportlayer

B:networklayer

C:applicationlayer

D:linklayer

答案:D第六章測(cè)試Therearetwoaddressfieldsin802.11frame.

A:錯(cuò)

B:對(duì)

答案:AWhatarethetypeofwirelessnetworks?

A:Singlehop,infrastructure-based

B:Multi-hop,infrastructure-based

C:Singlehop,infrastructure-less

D:Multi-hop,infrastructure-less

答案:ABCDHostsinwirelessnetworkscanworkintwomodes()

A:infrastructuremode

B:adhocmode

C:onlinemode

D:offlinemode

答案:ABAPstransmitbeaconframes.AnAP’sbeaconframeswillbetransmittedoveroneofthe()channels.Thebeaconframespermitnearbywireless