完整版计算机网络教程自顶向下方法选择题及答案Chapt2ApplicationLayerQUIZZ.docx
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完整版计算机网络教程自顶向下方法选择题及答案Chapt2ApplicationLayerQUIZZ.docx
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完整版计算机网络教程自顶向下方法选择题及答案Chapt2ApplicationLayerQUIZZ
Chapter2ApplicationLayer
1.
Inaclient-serverparadigm,a_______programprovidesservicestoa(another)_______program.
A)client;client
B)client;server
C)server;client
D)server;server
2.
Inaclient-serverparadigm
A)boththeserverandtheclientmustberunningallthetime.
B)boththeserverandtheclientneedtoberunningonlywhentheyareneeded.
C)theservermustberunningallthetimebuttheclientneedstoberunningonlywhenitisneeded.
D)theclientmustberunningallthetimebuttheserverneedstoberunningonlywhenitisneeded
3.
ThefirstsectionofaURLidentifieristhe__________.
A)protocol
B)path
C)host
D)port
4.
A_______documentisafixed-contentdocumentthatiscreatedandstoredinaserver.Theclientcangetacopyofthedocumentonly.
A)static
B)dynamic
C)active
D)Noneofthechoicesarecorrect
5.
_____________isalanguageforcreatingastaticdocument.
A)ExtensibleStyleLanguage(XSL)
B)HypertextMarkupLanguage(HTML)
C)ExtensibleMarkupLanguage(XML)
D)Allchoicesarecorrect
6.
A_______documentiscreatedbyaWebserverwheneverabrowserrequeststhedocument.
A)static
B)dynamic
C)active
D)Noneofthechoicesarecorrect
7.
Formanyapplications,weneedaprogramorascripttoberunattheclientsite.Thesearecalled_______________documents.
A)static
B)dynamic
C)active
D)Noneofthechoicesarecorrect
8.
HTTPusestheservicesof_________.
A)UDP
B)IP
C)TCP
D)DNS
9.
InHTTP,thefirstlineinarequestmessageiscalleda_______line;thefirstlineintheresponsemessageiscalledthe________line.
A)request;response
B)status;response
C)status;status
D)Noneofthechoicesarecorrect
10.
Ina___________connection,oneTCPconnectionismadeforeachrequest/response.
A)persistent
B)nonpersistent
C)persistentoranonpersistent
D)Noneofthechoicesarecorrect
11.
Ina___________connection,theserverleavestheconnectionopenformorerequestsaftersendingaresponse.
A)persistent
B)nonpersistent
C)persistentornonpersistent
D)Noneofthechoicesarecorrect
12.
InHTTP,_______serverisacomputerthatkeepscopiesofresponsestorecentrequests.
A)aregular
B)aproxy
C)anauxiliary
D)aremote
13.
AnHTTPrequestmessagealwayscontains_______.
A)aheaderlineandabody
B)arequestlineandaheaderline
C)arequestline,aheaderline,andabody
D)arequestline,aheaderline,ablankline,andabody
14.
WhichofthefollowingispresentinbothanHTTPrequestlineandastatusline?
A)versionnumber
B)URL
C)statuscode
D)method
15.
FTPusestheservicesof________.
A)UDP
B)IP
C)TCP
D)noneofthechoicesarecorrect
16.
InFTP,_________well-knownport(s)is(are)used.
A)one
B)two
C)three
D)four
17.
DuringanFTPsessionthecontrolconnectionisopened_______.
A)once
B)twice
C)manytimes
D)noneofthechoicesarecorrect
18.
DuringanFTPsessionthedataconnectionmaybeopened_______.
A)onlyonce
B)onlytwotimes
C)asmanytimesasneeded
D)noneofthechoicesarecorrect
19.
InFTP,afilecanbeorganizedintorecords,pages,orastreamofbytes.Thesearetypesofanattributecalled_______.
A)filetypes
B)datastructures
C)transmissionmodes
D)noneofthechoicesarecorrect
20.
InFTP,therearethreetypesof_______:
stream,block,andcompressed.
A)filetypes
B)datatypes
C)transmissionmodes
D)noneofthechoicesarecorrect
21.
InFTP,ASCII,EBCDIC,andimagedefineanattributecalled_______.
A)filetype
B)datastructure
C)transmissionmode
D)noneofthechoicesarecorrect
22.
InFTP,whenwe_______,itiscopiedfromtheclienttotheserver.
A)retrieveafile
B)storeafile
C)openafile
D)noneofthechoicesarecorrect
23.
Inthecommonscenario,theelectronicmailsystemneeds_________________________.
A)twoUAs,twoMTAsandoneMAA
B)twoUAs,twoMTAsandtwoMAAs
C)twoUAs,twopairsofMTAsandapairofMAAs
D)twoUAs,twopairsofMTAsandatwopairsofMAAs
24.
________providesservicetotheusertomaketheprocessofsendingorreceivingamessageeasier.
A)AnMTA
B)AnMAA
C)AUA
D)Noneofthechoicesarecorrect
25.
Ane-mailmessagecontainsthe________andthe__________.
A)header;envelop
B)header;body
C)envelop;body
D)Noneofthechoicesarecorrect
26.
IntheInternet,ane-mailaddressconsistsoftwoparts:
a_______anda_______.
A)localpart;domainname
B)globalpart;domainname
C)label;domainname
D)localpart;label
27.
_________isasupplementaryprotocolthatallowsnon-ASCIIdatatobesentthroughe-mail.
A)SMPT
B)MPEG
C)MIME
D)POP
28.
TheformalprotocolthatdefinestheMTAclientandserverintheInternetiscalled___________.
A)SMTP
B)SNMP
C)TELNET
D)SSH
29.
SMTPisa__________protocol.
A)pull
B)push
C)pushandpull
D)Noneofthechoicesarecorrect
30.
Themessageaccessprotocolisa________protocol.
A)pull
B)push
C)pushandpull
D)Noneofthechoicesarecorrect
31.
Inthe_______encodingscheme,each24bitsbecomefour6-bitchunks,andeventuallyaresentas32bits.
A)8bit
B)binary
C)base64
D)quoted-printable
32.
Inthe_______encodingscheme,anon-ASCIIcharacterissentas3characters.
A)8bit
B)base64
C)quoted-printable
D)binary
33.
TELNETisanabbreviationfor____________.
A)terminalnetwork
B)telephonenetwork
C)telecommunicationnetwork
D)Noneofthechoicesarecorrect
34.
Whenauserlogsintoalocaltime-sharingsystem,itiscalled________login.
A)local
B)remote
C)localorremote
D)Noneofthechoicesarecorrect
35.
Whenauserwantstoaccessanapplicationprogramorutilitylocatedonaremotemachine,heorsheperforms___________login.
A)local
B)remote
C)localorremote
D)Noneofthechoicesarecorrect
36.
NetworkVirtualTerminal(NVT)usestwosetsofcharacters,onefor_____andonefor__________.
A)sending;receiving
B)request;reply
C)data;control
D)Noneofthechoicesarecorrect
37.
Fordata,NVTusesUSASCIIcharacterswiththehighestorderbitsetto______.
A)1
B)0
C)1or0
D)Noneofthechoicesarecorrect
38.
Forcontrol,NVTusesUSASCIIcharacterswiththehighestorderbitsetto______.
A)1
B)0
C)1or0
D)Noneofthechoicesarecorrect
39.
The_______translateslocalcharactersintoNVTcharacters.
A)terminaldriver
B)TELNETclient
C)TELNETserver
D)pseudoterminaldriver
40.
The_______translatesNVTcharactersintoaformacceptablebytheremoteoperatingsystem.
A)terminaldriver
B)TELNETclient
C)TELNETserver
D)pseudoterminaldriver
41.
The_________componentintheSSHprovidesconfidentiality,integrity,authenticationandcompression.
A)SSHApplication
B)SSH-AUTH
C)SSH-CONN
D)SSH-TRAN
42.
Portforwardingis____________________________.
A)aprotocolusedtoforwardmessagesfromoneporttoanotherport
B)aprocedureforchanginganephemeralporttoawell-knownport
C)aservice,providedbySSH,thatcreatesasecurechannelforapplicationsthatdonothavesecurityservices.
D)Noneofthechoicesarecorrect
43.
Ina_______namespace,anameisasequenceofcharacterswithoutstructure.
A)linear
B)flat
C)hierarchical
D)organized
44.
Ina_________namespace,eachnameismadeofseveralparts.
A)linear
B)flat
C)hierarchical
D)organized
45.
IntheDNS,thenamesaredefinedin___________structure.
A)alinearlist
B)aninverted-tree
C)athree-dimensional
D)Noneofthechoicesarecorrect
46.
TherootoftheDNStreeis_______.
A)astringof127characters
B)astringof63characters
C)astringof15characters
D)anemptystring
47.
Inthedomainnamespace,afulldomainnameisasequenceoflabelsseparatedby________.
A)colons
B)semicolons
C)dots
D)commas
48.
Inthedomainnamespace,ifalabelisterminatedbyanullstring,itiscalleda__________.
A)PQDN
B)CQDN
C)SQDN
D)Noneofthechoicesarecorrect
49.
Inthedomainnamespace,ifalabelisnotterminatedbyanullstring,itiscalleda__________.
A)FQDN
B)PQDN
C)SQDN
D)Noneofthechoicesarecorrect
50.
Inthedomainnamespace,a_________isasubtreeofthedomainnamespace.
A)label
B)name
C)domain
D)Noneofthechoicesarecorrect
51.
Inthedomainnamespace,whataserverisresponsiblefororhasauthorityoveriscalleda_________.
A)domain
B)label
C)zone
D)Noneofthechoicesarecorrect
52.
A_______serverisacomputerwhosezonesystemconsistsofthewholetree.
A)domain
B)zone
C)root
D)primary
53.
A________serverisacomputerthatstoresafileaboutthezoneforwhichithasanauthority.
A)primary
B)secondary
C)zone
D)root
54.
A________serverisacomputerthattransfersthecompleteinformationaboutazonefromanotherserver.
A)primary
B)secondary
C)zone
D)root
55.
IntheInternet,thecountrydomainsectionuses___________countryabbreviations.
A)two-character
B)three-character
C)four-character
D)Noneofthechoicesarecorrect
56.
In__________resolution,theresolverexpectstheservertosupplythefinalanswer.
A)iterative
B)recursive
C)straight
D)Noneofthechoicesarecorrect
57.
In__________resolution,theserverreturnstheIPaddressoftheserverthatitthinkscanresolvethequery.
A)iterative
B)recursive
C)straight
D)Noneofthechoicesarecorrect
58.
DNScanusetheservicesof________.
A)UDP
B)TCP
C)eitherUDPorTCP
D)Noneofthechoicesarecorrect
59.
Aregis
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