计算机网络英文题库(附答案)chapter5.pdfVIP

计算机网络英文题库(附答案)chapter5--第1页

Chapter5TheLinkLayerandLocalAreaNetwork

1．A()protocolisusedtomoveadatagramoveranindividuallink.

Aapplication-layer

Btransport-layer

Cnetwork-layer

Dlink-layer

2．Theunitsofdataexchangedbyalink-layerprotocolarecalled().

Adatagrams

Bframes

Csegments

Dmessages

3．Whichofthefollowingprotocolsisnotalink-layerprotocol?()

AEthernet

BPPP

CHDLC

DIP

4．Inthefollowingfourdescriptions,whichoneisnotcorrect?()

Alink-layerprotocolhasthenode-to-nodejobofmovingnetwork-layerdatagrams

overasinglelinkinthepath.

BTheservicesprovidedbythelink-layerprotocolsmaybedifferent.

CAdatagrammustbehandledbythesamelink-layerprotocolsonthedifferent

linksinthepath.

DTheactionstakenbyalink-layerprotocolwhensendingandreceivingframes

includeerrordetection,flowcontrolandrandomaccess.

5．Whichofthefollowingservicescannotofferedbyalink-layerprotocol?()

Acongestioncontrol

BLinkAccess

CErrorcontrol

DFraming

6．()protocolservestocoordinatetheframetransmissionsofthemanynodeswhen

multiplenodesshareasinglebroadcastlink.

AARP

BMAC

CICMP

DDNS

7．Inthefollowingfourdescriptionsabouttheadapter,whichoneisnotcorrect?()

ATheadapterisalsocalledasNIC.

BTheadapterisasemi-autonomousunit.

CThemaincomponentsofanadapterar