计算机网络英文题库(附答案)chapter313127.pdfVIP

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Chapter3TransportLayer

1.Atransport-layerprotocolprovidesforlogicalcommunicationbetween____.

AApplicationprocesses

BHosts

CRouters

DEndsystems

2.Transport-layerprotocolsrunin____.

AServers

BClients

CRouters

DEndsystems

3.Intransportlayer,thesendsidebreaksapplicationmessagesinto____,passesto

networklayer.

AFrames

BSegments

CData-grams

Dbitstreams

4.Servicesprovidedbytransportlayerinclude____.

AHTTPandFTP

BTCPandIP

CTCPandUDP

DSMTP

5.WhichofthefollowingservicesisnotprovidedbyTCP?

ADelayguaranteesandbandwidthguarantees延迟保证和带宽保证

BReliabledatatransfersandflowcontrols

CCongestioncontrols

DIn-orderdatatransfers

6.Thesetwominimaltransport-layerservices____and____aretheonlytwo

servicesthatUDPprovides!

Aprocess-to-processdatadelivery,errorchecking

Bcongestioncontrol,reliabledatatransfer

Cflowcontrol,congestioncontrol

DIn-orderdatatransfer,errorchecking

7.Portnumber’sscopeis____to____.

A0,1023

B0,65535

C0,127

D0,255

8.Theportnumbersrangingfrom____to____arecalledwell-knownportnumber

andarerestricted.

A0,1023

B0,65535

C0,127

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D0,255

9.UDPsocketidentifiedbytwocomponents,theyare____.

Asource