计算机网络习题——chapter1.pdf

计算机网络习题——chapter1--第1页

Chapter1ComputerNetworksandtheInternet

1．The()isaworldwidecomputernetwork,thatis,anetworkthatinterconnectsmillionsof

computingdevicesthroughouttheworld.

ApublicInternet

BIntranet

Cswitchnet

Dtelevisionnet

2．Whichkindofmediaisnotaguidedmedia?()

Atwisted-paircopperwire

Bacoaxialcable

Cfiberoptics

Ddigitalsatellitechannel

3．Whichkindofmediaisaguidedmedia?()

Ageostationarysatellite

Blow-altitudesatellite

Cfiberoptics

DwirelessLAN

4．Theunitsofdataexchangedbyalink-layerprotocolarecalled().

AFrames

BSegments

CDatagrams

Dbitstreams

5．Whichofthefollowingoptionbelongstothecircuit-switchednetworks?()

AFDM

BTDM

CVCnetworks

DbothAandB

6．()meansthattheswitchmustreceivetheentirepacketbeforeitcanbegintotransmitthe

firstbitofthepacketontotheoutboundlink.

AStore-and-forwardtransmission

BFDM

CEnd-to-endconnection

DTDM

7．Processingdelaydoesnotincludethetimeto().

Aexaminethepacket’sheader

Bwaittotransmitthepacketontothelink

Cdeterminewheretodirectthepacket

Dcheckbit-errorinthepacket

8．TheInternet’snetworklayerisresponsibleformovingnetwork-layerpacketsknownas()

fromonehosttoanother.

Aframe

Bdatagram

Csegment

Dmessage