Computer Network Interview Questions and Answers YASH PAL, 19 March 202228 June 2025 The old model of a single computer serving all of the organization’s computational needs has been replaced by one in which a large number of separate but interconnected computers do the job. These systems are called computer networks. so here we are including basic to advanced Computer Network Interview Questions and Answers for the preparation of University exams, coding competitions, and Interview preparations.Protocols areagreements on how communication components and DTEs are to communicatelogical communication channels used for transferring dataphysical communication channels used for transferring datanone of the aboveAnswer – (1) agreements on how communication components and DTEs are to communicateThe method of communication in which transmission takes place in both directions, but only in one direction at a time is calledsimplexfour-wire circuitfull-duplexhalf-duplexAnswer – (4) half-duplexThe unmodulated signal coming from a transmitter is known ascarrier signalbaseband signalprimary signalnone of the aboveAnswer – (2) baseband signal Match List-I with List-II and select the correct answer using the codes given below the lists:List-ISession layerTransport layerApplication layerMDI (Medium Dependent Interface) List-IIconnects DCE to the physical channelprovides end-to-end connectivityprovides organized means to exchange data between users.(like synchronization points)supports an end-user process and performs the required file transfer. A B C D 3 4 2 1 3 2 4 1 2 4 1 3 4 3 2 1Answer – (2) 3 2 4 1The Hamming distance between 001111 and 010011 is1234Answer – (3) 3Choose the correct statements (s)Baseband network uses analog technologyThe Baseband network is Time Division MultiplexedThe broadband network uses digital technologyIn a broadband network, the carrier signals operate at a lower frequency.Answer – (2) Baseband network is Time Division MultiplexedThe _____________ measures the number of lost or garbled messages as a fraction of the total sent in the sampling periodResidual Error rateTransfer failure probabilityConnection release failure probabilityConnection establishment failure probabilityAnswer – (1) Residual Error rateWhich of the following ISO level is more closely related to the physical communications facilities?ApplicationSessionNetworkDatalinkAnswer – (4) DatalinkWhich of the following is not a field in the Ethernet message packet?TypeDataPin-codeAddressAnswer – (3) Pin-codeIn a broad sense, a railway track is an example ofsimplexhalf-duplexfull-duplexall of the aboveAnswer – (2) half-duplexThe frequency range at which the LAN coaxial cables will be used is10^6 to 10^8 Hz10^10 to 10^11 Hz10^3 to 10^4 Hz10^14 to 10^15 HzAnswer – (1) 10^6 to 10^8 HzMatch the following1. Data link layer(i) the lowest layer whose function is to activate, deactivate and maintain the circuit between DTE and DCE2. Physical layer(ii) performs routing and communication3. Presentation layer(iii) detection and recovery from errors in the transmitted data4. Network layer(iv) concerned with the syntax of the data1-(iii), 2-(i), 3-(iv), 4-(ii)1-(ii), 2-(i), 3-(iv), 4-(iii)1-(iv), 2-(i), 3-(ii), 4-(iii)1-(ii), 2-(i), 3-(iii), 4-(iv)Answer – (1) 1-(iii), 2-(i), 3-(iv), 4-(ii)A device that can convert digital signals to analog signals isa packeta modeman emulatornone of the aboveAnswer – (2) a modemAuto dialing allowsyou to dial a phone number by typing them on the keyboarda personal computer to answer incoming calls without human assistanceboth (a) and (b) abovenone of the aboveAnswer – (1) you to dial a phone number by typing them on the keyboardA network that requires human intervention to route signals is called abus networkring networkstar networkT-switched networkAnswer – (4) T-switched networkA packed-switching networkis freecan reduce the cost of using an information utilityallows communications channels to be shared among more than one userboth (b) and (c) aboveAnswer – (4) both (b) and (c) aboveLocal area networks can transmitfaster than telecommunications over public telephone linesslower than telecommunications over public telephone linesusing twisted-pair wiring or coaxial cablesboth (a) and (c) aboveAnswer – (4) both (a) and (c) aboveA T-switch is used tocontrol how messages are passed between computersecho every character that is receivedtransmit characters one at a timerearrange the connections between computing equipmentAnswer – (4) rearrange the connections between computing equipmentBulletin board systemis a public access message systemis a modem capable of accepting commandsconverts analog signals to digital signalscoverts digital signals to analog signalsAnswer – (1) is a public access message systemFDDI isring networkstar networkmesh networkbus-based networkAnswer – (1) bus-based networkNote – More questions and answers will be added from time to time. 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