计算机网络教程自顶向下方法选择题及答案Chapt4NetworkLayerQUIZZWord文档下载推荐.docx
- 文档编号:21429881
- 上传时间:2023-01-30
- 格式:DOCX
- 页数:18
- 大小:18.79KB
计算机网络教程自顶向下方法选择题及答案Chapt4NetworkLayerQUIZZWord文档下载推荐.docx
《计算机网络教程自顶向下方法选择题及答案Chapt4NetworkLayerQUIZZWord文档下载推荐.docx》由会员分享,可在线阅读,更多相关《计算机网络教程自顶向下方法选择题及答案Chapt4NetworkLayerQUIZZWord文档下载推荐.docx(18页珍藏版)》请在冰豆网上搜索。
5.
Inadatagramapproach,theforwardingdecisionisbasedonthevalueofthe_____________fieldinthepacketheader.
6.
Theperformanceofanetworkcanbemeasuredintermsof________.
A)delay
B)throughput
C)packetloss
D)allofthechoicesarecorrect
7.
Transmissiondelay(time)istheratioof______________________.
A)transmissionratetopacketlength
B)transmissionratetodistance
C)packetlengthtotransmissionrate
D)processingtimetotransmissionrate
8.
Propagationdelay(time)istheratioof______________________.
A)transmissionratetopropagationspeed
B)propagationspeedtodistance
C)packetlengthtopropagationspeed
D)distancetopropagationspeed
9.
Whentheloadinthenetworkreachesthenetworkcapacity,thepacketdelay___________andthenetworkthroughputreaches______________.
A)increasessharply;
itsminimum
B)increasessharply;
itsmaximum
C)decreasessharply;
D)decreasessharply;
10.
Inopen-loopcongestioncontrol,policiesareapplied____________________.
A)topreventcongestionbeforeithappens
B)toalleviatecongestionafterithappens
C)toeitherpreventcongestionbeforeithappensortoalleviatecongestionafterithappens
11.
The__________________techniqueisoneoftheopen-loopcongestionpolicy
A)backpressure
B)chokepacket
C)implicitsignaling
12.
The__________________techniqueisoneoftheclose-loopcongestionpolicy
A)acknowledgmentpolicy
C)discardingpolicy
13.
IPisa_________protocol.
A)connection-orientedunreliable
B)connection-orientedreliable
C)connectionlessunreliable
D)connectionlessreliable
14.
AnHLENvalueofdecimal10means_______.
A)thereare10bytesofoptions
B)thereare10bytesintheheader
C)thereare40bytesofoptions
D)thereare40bytesintheheader
15.
Ifthefragmentoffsethasavalueof100,itmeansthat_______.
A)thedatagramhasnotbeenfragmented
B)thedatagramis100bytesinsize
C)thefirstbyteofthedatagramisbyte800
16.
Whatisneededtodeterminethenumberofthelastbyteofafragment?
A)offsetnumber
B)totallength
C)bothoffsetnumberandthetotallength
17.
TheIPheadersizeis_______byteslong.
A)20to60
B)20
C)60
18.
PacketsintheIPlayerarecalled_________.
A)segments
B)datagrams
C)frames
19.
Thetotallengthfielddefinesthetotallengthofthedatagram_________.
A)includingtheheader
B)excludingtheheader
C)excludingtheoptionlength
20.
Whenadatagramisencapsulatedinaframe,thetotalsizeofthedatagrammustbelessthanthe_______.
A)MUT
B)MAT
C)MTU
21.
AnIPv4addressisnormallyrepresentedinbase____indotted-decimalnotation.
A)16
B)256
C)10
22.
Inclassfuladdressing,theIPv4addressspaceisdividedinto_______classes.
A)3
B)4
C)5
23.
Thenumberofaddressesassignedtoanorganizationinclasslessaddressing_______.
A)canbeanynumber
B)mustbeamultipleof256
C)mustbeapowerof2
24.
Thefirstaddressassignedtoanorganizationinclasslessaddressing_______.
A)mustbeevenlydivisiblebythenumberofaddressesintheorganization
B)mustbedivisibleby128
C)mustbelongtooneoftheA,B,orCclasses
25.
Insubnetting,thenumberofaddressesineachsubnetmust_______.
A)beapowerof2
B)beamultipleof128
C)bedivisibleby128
26.
WhatisthedefaultprefixlengthforclassAinCIDRnotation?
A)9
B)8
C)16
27.
WhatisthedefaultprefixlengthforclassBinCIDRnotation?
28.
WhatisthedefaultprefixlengthforclassCinCIDRnotation?
A)24
29.
DHCPisa(an)___________layerprotocol.
A)application
B)transport
C)network
D)data-link
30.
InDHCP,theclientuses________portandtheserveruses_________port.
A)anephemeral;
awell-known
B)awell-known;
C)awell-known;
anephemeral
31.
DHCPusestheservicesof_______.
A)UDP
B)TCP
C)IP
32.
_________allowsasitetouseasetofprivateaddressesforinternalcommunicationandasetofglobalInternetaddressesforcommunicationwiththerestoftheworld.
A)DHCP
B)NAT
C)IMCP
33.
Theideaofaddressaggregationwasdesignedtoalleviatetheincreaseinroutingtableentrieswhenusing________addressing.
A)classful
B)classless
C)classfulorclassless
34.
Theuseofhierarchyinroutingtablescan________thesizeoftheroutingtables.
A)reduce
B)increase
C)neitherreducenorincrease
35.
ICMPisa(an)_________layerprotocol.
A)application-layerprotocolthathelpsTCP/IPatthenetworklayer
B)transport-layerprotocolthathelpsTCP/IPatthenetworklayer
C)network-layerprotocol.
D)data-linklayerprotocolthathelpsTCP/IPatthenetworklayer
36.
WhichofthefollowingistrueaboutICMPmessages?
A)AnICMPerrormessagemaybegeneratedforanICMPerrormessage.
B)AnICMPerrormessagemaybegeneratedforafragmenteddatagram.
C)AnICMPerrormessagemaybegeneratedforamulticastdatagram.
37.
Routinginsideanautonomoussystemisreferredtoas________routing.
A)interdomain
B)intradomain
C)out-of-domain
38.
Routingbetweenautonomoussystemsisreferredtoas______routing.
A)interdomainrouting
B)intradomainrouting
39.
In_______routing,theleastcostroutebetweenanytwonodesistheroutewiththeminimumdistance.
A)pathvector
B)distancevector
C)linkstate
40.
In________,eachnodemaintainsavector(table)ofminimumdistancestoeverynode.
41.
Indistancevectorrouting,eachnodeperiodicallysharesitsroutingtablewith_________andwheneverthereisachange.
A)everyothernode
B)itsimmediateneighbors
C)oneneighbor
42.
TheRoutingInformationProtocol(RIP)isanintradomainroutingbasedon_________routing.
A)distancevector
B)linkstate
C)pathvector
43.
Themetricusedby_______isthehopcount.
A)OSPF
B)RIP
C)BGP
44.
InRIP,the________timercontrolstheadvertisingofregularupdatemessages.
A)garbagecollection
B)expiration
C)periodic
45.
InRIP,the________timerisusedtopurgeinvalidroutesfromthetable.
46.
InRIP,the________timercontrolsthevalidityoftheroute.
47.
RIPusestheservicesof_______.
A)TCP
B)UDP
48.
The_________routingusestheDijkstraalgorithmtobuildaroutingtable.
49.
TheOpenShortestPathFirst(OSPF)protocolisanintradomainroutingprotocolbasedon_______routing.
50.
The_______protocolallowstheadministratortoassignacost,calledthemetric,toeachroute.
51.
InOSPF,a________linkconnectstworouterswithoutanyotherhostorrouterinbetween.
A)point-to-point
B)transient
C)stub
52.
InOSPF,a_______linkisanetworkwithseveralroutersattachedtoit.
53.
InOSPF,a________linkisanetworkconnectedtoonlyonerouter.
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 计算机网络 教程 向下 方法 选择题 答案 Chapt4NetworkLayerQUIZZ
链接地址:https://www.bdocx.com/doc/21429881.html