版權(quán)說明:本文檔由用戶提供并上傳,收益歸屬內(nèi)容提供方,若內(nèi)容存在侵權(quán),請(qǐng)進(jìn)行舉報(bào)或認(rèn)領(lǐng)
文檔簡(jiǎn)介
Chapter2ApplicationLayer1.Inthefollowingfourdescriptions,whichoneiscorrect?AInC/Sarchitecture,clientscommunicatewitheachotherdirectly.BInC/Sarchitecture,clienthasafixedwell-knownaddress.CInP2Parchitecture,peerscommunicatewitheachotherdirectly.DInP2Parchitecture,peerhasafixedwell-knownaddress.2.Inthecontextofacommunicationsessionbetweenapairofprocess,theprocessthatinitiat(yī)esmunicationislabeledasthe,theprocessthatwaitstobecontactedtobeginthesessionislabeledasthe.Aclientprocess,serverprocessBsendingprocess,receivingprocessCinputprocess,outputprocessDcommunicatingprocess,connectingprocess3.Asocketistheinterfacebetweenwithinahost.AworklayerandthelinklayerBthelinklayerandthephysicallayerCtheapplicat(yī)ionlayerandthetransportlayerDthetransportlayerandthenetworklayer4.Inthefollowingapplications,whichoneisaloss-tolerantapplication?AE-mailBfiletransferCinstantmessagingDreal-timeaudio5.Inthefollowingapplications,whichoneisabandwidth-sensitiveapplication?AE-mailBwebapplicationCreal-timeaudioDfiletransfer6.TheserviceofTCPcan’tguarantee.AdeliveryofalldatawithouterrorBdeliveryofalldataintheproperorderCtherateofdeliveryDcongestioncontrol7.Inthefollowingapplications,whichoneusesUDP?AE-mailBwebapplicationCfiletransferDDNS8.InthefollowingdescriptionsaboutHTTP,whichoneisnotcorrect?AHTTPusesnon-persistentconnectionsinitsdefaultmode.BHTTPusesTCPasitsunderlyingtransportprotocol.CHTTPisastatelessprotocol.DHTTPisclient-serverarchitecture.9.SupposeawebpageconsistsofabaseHTMLfile,5JEPGimagesandajavaapplet,andalsosupposeHTTPusespersistentconnectionwithoutpipelining,thetotalresponsetimeis.A2RTTB8RTTC12RTTD14RTT10.InHTTPresponsemessage,iftherequestedHTTPprotocolversionisnotsupported,thestat(yī)uscodeis.A200B301C4001~5
CACDC
6~10
CDABD11.Theportnumberofwebapplicationis.A25B20C8012.AnetworkentitythatsatisfiesHTTPrequestsonthebehalfofanoriginwebserveris.AserverfarmBserverstackCproxyserverDedgeserver13.Inthefollowingdescriptionsaboutpersistentconnection,whichoneisnotcorrect?ATheserverleavestheTCPconnectionopenaftersendingaresponse.BEachTCPconnectionisclosedaftertheserversendingoneobject.CTherearetwoversionsofpersistentconnection:withoutpipeliningandwithpipelining.DThedefaultmodeofHTTPusespersistentconnectionwithpipelining.14.FTPusestwoparallelTCPconnectionstotransferafile,thereare.AcontrolconnectionanddataconnectionBreceivingconnectionandsendingconnectionCclientconnectionandseverconnectionDprogramconnectionandprocessconnection15.InthefollowingdescriptionsaboutFTP,whichoneiscorrect?AFTPisp2parchitecture.BFTPsendsitscontrrmationout-of-band.CFTPusespersistentconnection.DFTPisastatelessprotocol.16.
In
the
commands
of
FTP,
which
one
does
not
have
parameter?
A
USER
B
PASS
C
LIST
D
STOR17.TheInternetmailsystemhasthreecomponentswhichtheyare.Auseragent,SMTP,POP3BSMTP,POP3,IMAPCuseragent,SMTP,IMAPDuseragent,SMTP,mailserver18.IfthestatuscodeinHTTPresponsemessageis404,itmeans.ARequestsucceeded.BTherequesteddocumentdoesn’texitonthisserver.CThisisagenericerrorcodeindicatingthattherequestcouldnotbeunderstoodbytheserver.DRequestedobjecthasbee(cuò)npermanentlymover.19.ComparisonHTTPwithSMTP,thecorrectis.AHTTPisaputocol,andSMTPisapullprotocol.BInthedefaultmode,bothofthemusepersistentconnection.CHTTPplacesallofthemessage’sobjectsintoonemessage,andSMTPsendseveryobjectonebyone.DHTTPrequireseachmessagetobein7-bitASCIIformat,andSMTPdoesn’timposethisrestriction.20.TheheadersintheMIMEmessagemustincludeexcept.AFromBContent-typeCContent-transfer-encodingDMIMEversion11~15CCBAB
16~20
DDBBD21.Inthefollowingprotocol,whichoneisstateless?APOP3BSMTPCFTPDIMAP22.DNSmeans.ADat(yī)aNameSystemBDataNationalSystemCDomainNameSystemDDomainNationalSystem23.Therearethree(cuò)classesofDNSserverexcept.ARootDNSserverBLocalDNSserverCTLDserverDAuthoritat(yī)iveDNSserver24.DNSprovidessomeservicesexcept.AHostaliasingBMailserveraliasingCLoaddistributionDAsinglepointoffailure25.
There
are
three
architectures
for
locating
content
in
P2P
file
sharing,
KaZaA
uses
.
A
Centralized
Directory
(Napster)
B
Query
Flooding(Gnutella)C
Exploiting
Heterogeneity
(p141)
D
Incentive
Priorities
26.
There
are
three
architectures
for
locat(yī)ing
content
in
P2P
file
sharing,
Napster
uses
.
A
Centralized
Directory
(p137)
B
Query
Flooding
C
Exploiting
Heterogeneity
D
Incentive
Priorities27.
The
following
architectures
in
P2P
file
sharing,
which
is
an
overlay
network?
A
Centralized
Directory
B
Query
Flooding(p139)
C
Exploiting
Heterogeneity
D
Incentive
Priorities
28.Thetimeittakesforasmallpackettotravelfromclienttoserverandthenbacktotheclientis.Around-traveltimeBnext-hoptimeCround-triptimeDprefix-mat(yī)chingtime29.SupposeA(withaWeb-basede-mailaccount)sendsamessagetoB(whoaccesseshismailserverusingPOP3),whichapplication-layerprotocolisnotused?AHTTPBSMTPCPOP3DIMAP30.Inthefourfollowingoptions,whichprotocolisincludedinMailAccessProtocol?ASMTPBDHCPCIMAPDFTP31.InFTPcommands,isusedtosenduserpasswordtotheserver.AUserBPassCRetrDStor32.ThefunctionoftheadditionalheaderfieldinMIMEContent-Typeis.Atoconvertthemessagebodytoitsoriginnon-ASCIIformBtodeterminewhatactionsitshouldtakeonmessagebodyCtosendanE-mailtothereceivinguseragentDtoindicat(yī)ewhattypethemessageis33.Inthefourfollowingoptions,whichapplicationisorganizedashybridofC/SandP2Parchitecture?AE-mailBOICQCFiletransferDWebapplication34.
In
the
four
following
options,
which
is
not
a
centralized
DNS
design’s
problem?
A
a
single
point
of
failure
B
traffic
volume
C
distant
centralized
database
D
slow
(maintenance)Inthefollowingoptions,fromtheapplicationdeveloper’sperspective,whichisnotcorrect?AthenetworkarchitectureisfixedBthenetworkarchitectureprovidesaspecificsetofservicestoapplicat(yī)ionsCtheapplicationarchitectureisdesignedbythephysicaldevicesDtheapplicationarchitecturedictateshowtheapplicationisorganizedoverthevariousendsystems36.Therearethreepredominantarchitecturesusedinmodernnetworkapplications,whichoneisnotincluded?Atheclient-serverarchitectureBtheP2ParchitectureCahybridoftheclient-serverandP2ParchitectureDahybridoftheclient-serverandbrowser-serverarchitecture37.InthefollowingoptionsaboutC/Sarchitecture,whichisnotcorrect?AInC/Sarchitecture,thereisanalways-onhost,calledtheserver.BInC/Sarchitecture,thereisanalways-onhost,calledtheclient.CTheserverhasafixed,well-knownaddress,calledIPaddress.DClientsdonotdirectlycommunicatewitheachother.38.
are
often
used
to
create
a
powerful
virtual
server
in
C/S
architecture.
A
Peers
B
Server
farm
C
server
stack
D
local
server39.Aprocesssendsmessagesinto,andreceivesmessagesfrom,thenetworkthroughits.AsocketBprogramCclientDpeer40.Whichoneisnotdefinedbyanapplication-layerprotocol?AthetypesofmessagesexchangedBthesyntaxofvariousmessagetypesCthesemanticsofthefieldsDrulesfordeterminingwhenandhowtotranslat(yī)ethesocket41.HTTPcanusetwotypesofconnections,whichare.Apersistentandnon-persistentconnectionBconnectionwithpipeliningandwithoutpipeliningCTCPandUDPDparallelandserialconnection42.takesforasmallpackettotravelfromclienttoserverandthenbacktotheclient.ARDTBthresholdCRTTDoverhead43.ThedefaultmodeofHTTPuses.Anon-persistentconnectionwithpipeliningBnon-persistentconnectionwithoutpipeliningCpersistentconnectionwithpipeliningDpersistentconnectionwithoutpipelining44.InHTTPrequestmessages,therequestlinehasthree(cuò)fields,thereare.Athemethodfield,theURLfieldandtheHTTPversionfieldBthemethod,theconnectionandURLfieldCtheuser-agent,themethodandHTTPversionfieldDtheuser-agent,theURLandtheHTTPversionfield45.IntheheaderlinesofHTTPrequestmessage,ifthefieldofConnectionisclose,itspecifies.AthehostonwhichobjectresidesBwhattypeoftheuseragentCthatthebrowserwantstheservertoclosetheconnectionaftersendingtherequestedobjectDwhichlanguagecanthebrowserreceive46.InHTTPresponsemessage,ifthestatuscodeis404,itmeans.ArequestsucceededandtheinformationisreturnedintheresponseBrequestedobjecthasbeenpermanentlymovedCtherequestedHTTPprotocolversionisnotsupportedbytheserverDtherequesteddocumentdoesnotexistonthisserver47.isanetworkentitythatsatisfiesHTTPrequestsonthebehalfofanoriginWebserver.AproxyserverBlocalserverCDNSserverDWebserver48.Inthefollowingfouroptionsaboutwebcache,whichoneisnotcorrect?AAwebcacheisbothaserverandaclientatthesametime.BAwebcacheispurchasedandinstalledbyanISP.CAwebcachecanraisetheresponsetimeforaclientrequest.DAwebcachecanreducetrafficonaninstitution’saccesslinktotheInternet.49.TherequestmessageintheconditionalGETmustincludetheheaderline.ALast-ModifiedBLast-ReferencedCIf-Modified-SinceDIf–Referenced-Since50.FTPusestwoparallelconnectionstotransferafile,theyare.ATCPandUDPconnectionBconnectionwithpipeliningandwithoutpipeliningCcontrolandataconnectionDclient-serverandbrowser-serverconnection51.InFTPcommands,whichoneisusedtoasktheservertosendbackalistofallfilesinthecurrentremotedirectory?AUSERBPASSCLISTDRETR52.IntheInternetmailsystem,allowuserstoread,replyto,forward,saveandcomposemessage.AUseragentsBmailserversCSMTPDTCP53.ThetwokeyMIMEheadersforsupportingmultimediaare.AContent-TypeandMIME-VersionBContent-TypeandContent-Transfer-EncodingCContent-Transfer-EncodingandMIME-VersionDMIME-VersionandMIME-Type54.ForInternetmail,themailaccessprotocolisusedto.Atransfermailfromtherecipient’smailservertotherecipient’suseragentBtransfermailfromthesender’smailservertotherecipient’smailserverCtranslatethemailfromthesender’smailserverDtranslatethemailintotherecipient’smailserver55.POP3progressesthroughthreephases,whichtheyare.Aauthorization,translationandtransactionBauthorizat(yī)ion,translationandupdat(yī)eCauthorization,transactionandupdateDtranslation,transactionandupdate56.Inthefollowingfourservices,whichonecannotprovidebyDNS?AHostaliasingBMailserveraliasingCtranslat(yī)ehostnametoIPaddressesDtranslateMACaddressestoIPaddresses57.TherearethreeclassesofDNSservers,thereare.ArootDNSserver,top-leveldomainDNSserverandlocalDNSserverBrootDNSserver,top-leveldomainDNSserverandauthoritativeDNSserverCrootDNSserver,localDNSserverandauthoritativeDNSserverDrootDNSserver,localDNSserverandtop-leveldomainDNSserver58.InthefollowingfouroptionsaboutPOP3,whichoneisnotcorrect?ATheuseragentemployedonlythreecommands:List,RetrandQuitBTheserverdoesnotcarrystateinformationacrossPOP3sessionsCTheportnumberis110DThePOP3protocoldoesnotprovideanymeansforausertocreateremotefoldersandassignmessagestofolders.59.
A
resource
record
in
DNS
distributed
database
is
a
four-tuple,
which
field
can
be
ignored?(p132)
A
Name
B
Value
C
Type
D
TTL60.
In
the
following
four
options
about
DNS
resource
record,
which
one
is
correct?
A
The
meaning
of
Name
and
Value
depend
on
Type.
B
The
meaning
of
Value
and
Type
depend
on
Name.
C
If
Type=A,
then
Name
is
a
domain
and
Value
is
the
IP
address
for
the
hostname.
D
If
Type=MX,
then
Name
is
domain
and
Value
is
the
IP
address
for
the
hostname.
61.
In
the
following
four
options
about
DNS
messages,
which
one
is
not
correct?
A
There
are
only
two
kinds
of
DNS
message.(p133)
B
Both
query
and
reply
message
have
the
same
format.
C
The
header
section
in
DNS
message
has
12
bytes.
D
The
authority
section
contains
the
resource
records
for
the
same
that
was
originally
queried.
62.
In
DNS
message,
contains
informat(yī)ion
about
the
query
that(yī)
is
being
made.(p133)
A
authority
section
B
question
section
C
answer
section
D
additional
section63.
There
are
three
techniques
are
employed
in
most
any
P2P
file-sharing
systems,
which
one
is
not
include?
(p144)
A
Request
queuing
B
incentive
priorities
C
parallel
downloading
D
Response
queuing64.InthefollowingfouroptionsaboutP2Pfile-sharing,whichoneisnotcorrect?AP2Pfile-sharingishighlyscalable.BP2Pfile-sharingreliesonP2Parchitecture.CThemeansforlocatingcontentindifferentP2Pfile-sharingaredifferent.DP2Pfile-sharingsystemsnotonlyshareMP3s,butalsovideos,software,documentsandimages.65.
In
MIME
header
lines,
specifies
the
name
of
the
SMTP
server
that
sent
the
message
(from),
the
name
of
the
SMTP
server
that
received
the
message
(by),
and
the
time
an
which
the
receiving
server
received
the
message.
A
Received
B
From
C
To
D
MIME-Version
66.IftheheaderlineConnectionisclose,itmeansthattheclientwants.ApersistentconnectionwithpipeliningBpersistentconnectionwithoutpipeliningCnonpersistentconnectionDnotconnection67.InHTTPrequestmessage,thee(cuò)ntitybodyisemptywiththemethod,butisusedwiththemethod.AGET,POSTBPOST,GETCGET,HEADDPOST,HEAD68.InHTTPresponsemessage,iftheDat(yī)e:header;oneindicatesthetimeFri.08Aug.202312:00:00GMT,theLast-Modified:headerlinecannotbe.AFri.08Aug.202311:00:00GMTBFri.08Aug.202311:30:00GMTCFri.08Aug.202312:00:00GMTDFri.08Aug.202312:30:00GMT69.Inthefollowingfouroptions,whichoneisnotthepartofcookietechnology?ACookieheaderlinesintheHTTPresponsemessageandrequestmessage.BOnecookieheaderfilekeptontheuser’sendsystemandmanagedbytheuser’sbrowser.CAnetworkentitythatsatisfiesHTTPrequestsonthebehalfofanoriginWebserver.DAback-enddatabaseattheWebsite70.On-topofstat(yī)elessHTTP,canbeusedtocreat(yī)eausersessionlayer.AproxyserverBWebcacheCcookieDsocket71.Processescommunicatewitheachotherbyreadingfromandwritingto.AprogramsBthreadsCsocketsDchannels72.Inthefollowingfouroptionsaboutnetworkarchitecture,whichoneisnotcorrect?AThenetworkarchitectureisfixed.BThenetworkarchitectureprovidesaspecificsetofservicestoapplication.CThenetworkarchitectureisdesignedbyapplicationdeveloper.DThenetworkarchitecturedictateshowtheapplicationisorganizedoverspecialserver.73.InClient-Serverarchitecture,theclientsvisittheserver’sthrough.Aclient’ssocketBclient’sIPaddressCserver’ssocketDserver’sIPaddress74.canbethoughtofasaprogramthat(yī)isrunningwithinendsystem.AprocessBthreadCsocketDcontext75.APImeans.AApplicat(yī)ionProgramInterfaceBApplicationProcessInterfaceCAppellationProgramInterfaceDAppellationProcessInterface76.Onehostcanberunningmanynetworkapplications,sothesystemassignsthemdifferenttodistinguisheachother.AIPaddressBportnumberChostnameDsection77.Inthefollowingfourapplications,whichoneisbothbandwith-sensitiveandrequiretighttimingconstraints?Areal-timeaudioBfiletransferCE-mailDWebdocuments78.TheportnumberoftheWebserveris.A25B20C8079.Theportnumberofthemailserveris.A25B20C80D808080.LooktheURL,theobject’spathnameis.A.edu.cnB./rjxyC/rjxy/index.htmlDindex.html81.EachURLhascomponents,theyare.Atransportprotocolandobject’spathnameBhostnameando
溫馨提示
- 1. 本站所有資源如無(wú)特殊說明,都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請(qǐng)下載最新的WinRAR軟件解壓。
- 2. 本站的文檔不包含任何第三方提供的附件圖紙等,如果需要附件,請(qǐng)聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
- 3. 本站RAR壓縮包中若帶圖紙,網(wǎng)頁(yè)內(nèi)容里面會(huì)有圖紙預(yù)覽,若沒有圖紙預(yù)覽就沒有圖紙。
- 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
- 5. 人人文庫(kù)網(wǎng)僅提供信息存儲(chǔ)空間,僅對(duì)用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理,對(duì)用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯,并不能對(duì)任何下載內(nèi)容負(fù)責(zé)。
- 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容,請(qǐng)與我們聯(lián)系,我們立即糾正。
- 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時(shí)也不承擔(dān)用戶因使用這些下載資源對(duì)自己和他人造成任何形式的傷害或損失。
最新文檔
- 新疆維吾爾自治區(qū)奇臺(tái)縣第四中學(xué)2024屆九年級(jí)上學(xué)期期末考試數(shù)學(xué)試卷(含答案)
- 《社會(huì)調(diào)查方法》課件
- 養(yǎng)老院老人疾病預(yù)防措施制度
- 保險(xiǎn)精算分類費(fèi)率課件講解
- 收物業(yè)費(fèi)保密協(xié)議書(2篇)
- 《藥品采購(gòu)》課件
- 《高血壓規(guī)范化診治》課件
- 2024年度食用菌產(chǎn)業(yè)投資基金銷售合同3篇
- 2025年南陽(yáng)貨運(yùn)上崗證模擬考試題
- 2025年洛陽(yáng)貨運(yùn)考試題庫(kù)
- 人教版初中八年級(jí)上冊(cè)《信息技術(shù)》1.1認(rèn)識(shí)flash和flash動(dòng)畫教學(xué)設(shè)計(jì)信息技術(shù)
- 2025年山東省春季高考模擬考試英語(yǔ)試卷試題(含答案+答題卡)
- 五年級(jí)上冊(cè)英語(yǔ)單詞表外研
- 檢驗(yàn)科降低檢測(cè)報(bào)告超時(shí)率PDCA持續(xù)改進(jìn)案例
- 買賣合同法律知識(shí)及風(fēng)險(xiǎn)防范培訓(xùn)課件
- 2023年遼寧省水資源管理集團(tuán)有限責(zé)任公司招聘考試真題
- Module 9 Unit2教學(xué)設(shè)計(jì)2024-2025學(xué)年外研版英語(yǔ)九年級(jí)上冊(cè)
- 有趣的機(jī)械結(jié)構(gòu)智慧樹知到答案2024年青島濱海學(xué)院
- 第5課 推動(dòng)高質(zhì)量發(fā)展
- 2024年網(wǎng)格員述職報(bào)告
- 一年級(jí)口算練習(xí)題一天50道
評(píng)論
0/150
提交評(píng)論