网络面试问题和答案networking-interviewquestionsandanswers

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1、Network!ng-InterviewQuestionsandAnswers1.DefineNetwork?Anetworkisasetofdevicesconnectedbyphysicalmedialinks.Anetworkisrecursivelyisaconnectionoftwoormorenodesbyaphysicallinkortwoormorenetworksconnectedbyoneormorenodes.2.WhatisaLink?Atthelowestlevel,anetworkcanconsist

2、oftwoormorecomputersdirectlyconnectedbysomephysicalmediumsuchascoaxialcableoropticalfiber.SuchaphysicalmediumiscalledasLink.3.Whatisanode?Anetworkcanconsistoftwoormorecomputersdirectlyconnectedbysomephysicalmediumsuchascoaxialcableoropticalfiber.Suchaphysicalmediumis

3、calledasLinksandthecomputeritconnectsiscalledasNodes.4.WhatisagatewayorRouter?AnodethatisconnectedtotwoormorenetworksiscommonlycalledasrouterorGateway.Itgenerallyforwardsmessagefromonenetworktoanother.5.Whatispoint-pointlink?Ifthephysicallinksarelimitedtoapairofnodes

4、itissaidtobepoint-pointlink.6.WhatisMultipleAccess?Ifthephysicallinksaresharedbymorethantwonodes,itissaidtobeMultipleAccess.7.WhataretheadvantagesofDistributedProcessing?a.Security/Encapsulationb.Distributeddatabasec.FasterProblemsolvingd.Securitythroughredundancye.C

5、ollaborativeProcessing8.Whatarethecriterianecessaryforaneffectiveandefficientnetwork?a.PerformanceItcanbemeasuredinmanyways,includingtransmittimeandresponsetime.b.ReliabilityItismeasuredbyfrequencyoffailure,thetimeittakesalinktorecoverfromafailure,andthenetwork'srobu

6、stness.c.SecuritySecurityissuesincludesprotect!ngdatafromunauthorizedaccessandvirues・9.Namethefactorsthataffecttheperformanceofthenetwork?a.NumberofUsersb.Typeoftransmissionmediumc.Hardwared.Software1.Namethefactorsthataffectthereliabilityofthenetwork?a.Frequencyoffa

7、ilureb.Recoverytimeofanetworkafterafailure2.Namethefactorsthataffectthesecurityofthenetwork?a.UnauthorizedAccessb.Viruses3.WhatisProtocol?Aprotocolisasetofrulesthatgovernallaspectsofinformationcommunication.4.Whatarethekeyelementsofprotocols?Thekeyelementsofprotocols

8、area.SyntaxItreferstothestructureorformatofthedata,thatistheorderinwhichtheyarepresented.b.SemanticsItreferstothemeaningofeachsecti