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)VintonCerfandBobMetcalfeb)VintonCerfandRobertKahnc)BobMetcalfeandIvanSutherlandd)BobMetcalfeandDavidClark2.IntheOSIreferencemodel,3.TheupperlayersoftheOSImodelare,incorrectorderBa)Session,application,presentationb)Session,presentation,applicationc)Session,application,presentation,physicald)Application,presentation,session4.ThelowerlayersoftheOSImodelare,incorrectorderDa)physical,system,network,logicalb)physical,logical,network,systemc)physical,transport,network,datalinkd)physical,datalink,network,transport5.TheInternetProtocol(IP)generallycorrespondstowhichOSIlayer?Aa)Network(layerthree)b)Transport(layerfour)c)Datalink(layertwo)d)Session(layerfive)6.MTUstandsforCa)MinimumTransferUnitb)MinimumTransmissionUnitc)MaximumTransmissionUnitd)MaximumTransferUnit7.WhatlayeroftheOSImodelisdesignedtoperformerrordetectionfunctions?Ba)Physicalb)Datalinkc)Networkd)transport8.WhichofthesenetworkdevicesprimarilyfunctionsattheOSINetworklayer(layer3)?Ca)Switchb)Gateway)Routerd)Alloftheabove9.Whatisthesizeoftoday’sstandard(IPv4)IPaddress?Aa)4bytes(32bits)b)12bytes(96bits)c)15bytes(120bits)d)16bytes(128bits)10.Whatisthesizeofthenext-generation(IPv6)IPaddress?a)4bytes(32bits)b)12bytes(96bits)c)15bytes(120bits)d)16bytes(128bits)11.Whichofthefollowinghigher-levelprotocolsrunsoverIP?Da)FTPb)HTTPc)SMTPd)Alloftheabove12.WhichofthefollowingIPv4addressesistheloopbackaddress?Ca)0.0.0.0b)10.0.0.1c)127.0.0.1d)255.255.255.25513.WhichofthefollowingIPv6addressesistheloopbackaddress?Ba)0::0b)0::1c)127::0d)127::114.ThelengthofanIPdatagramheadercanvarydependingontheoptionsused.WhatisthesmallestpossibleIPheadersize?Ba)16bytesb)20bytesc)24bytesd)60bytes15.ThesourceIPaddressforanIPv4datagramisstoredwhereintheheader?Ca)2ndlongword(bytes5-8)b)3rdlongword(bytes9-12)c)4rdlongword(bytes13-16))5rdlongword(bytes17-20)16.ThedestinationIPaddressforanIPv4datagramisstoredwhereintheheader?Da)2ndlongword(bytes5-8)b)3rdlongword(bytes9-12)c)4rdlongword(bytes13-16)d)5rdlongword(bytes17-20)17.TheheaderlengthfieldinanIPv4datagramcontainsthesizeofanIPheadermeasuredinnumberofCa)Bitsb)Bytesc)Longwords(4bytes)d)Noneoftheabove18.CanIPrunoveranyotherphysicalnetworksbesidesEthernet?Da)No(andIPdoesnotrunoverEthernet)b)Noc)Yes(butIPdoesnotrunoverEthernet)d)Yes19.WhatfunctiondoesAddressResolutionProtocol(ARP)perform?Aa)ConvertsIPaddressestoEthernetaddressesb)AutomaticallyassignsIPaddressestocomputersc)PreventstwocomputersfromusingthesameIPaddressd)Noneoftheabove20.WhatmechanismdoesARPusetoresolveIPaddresses?Ba)Mathematicalformulab)Lookuptablec)Centralwebsited)Randomnumbergenerator21.WhichutilityprogramisdesignedtoreportwhetheranetworkedcomputerisrespondingatagivenIPaddress,andhowlongtheseresponsestake?Ba)tracerouteb)pingc)ttcpd)netstate22.whichoftheseshellcommandssuppliestheIPaddressofacomputerrunningtheLinuxoperatingsystem?Ba)ipconfigb)ifconfig)linuxconfd)noneoftheabove23.WhichofthefollowingtechnologiesmanagetheconversionbetweenIPaddressesandhostnames?Ba)BGPb)DNSc)ARPd)Alloftheabove24.CIDRstandsforDa)Class-basedInternetDomainRoutingb)CarefulInter-DomainRoutingc)ConstantInternetDomainRoutingd)ClasslessInter-DomainRouting25.InCIDRnotation,whichofthefollowingnetworkscontainshost192.168.14.2?Ba)192.168.10.0/22b)192.168.11.0/21c)192.168.12.0/23d)192.168.13.0/2426.WhichcentralauthorityisresponsibleforallocatingIPaddressesontheInternet?Ba)IETFb)IANAc)IEEEd)Noneoftheabove27.TheIPdeliveryserviceisCa)Reliable,connection-orientedb)Non-routablec)Unreliable,connectionlessd)Noneoftheabove28.TCPstandsforAa)TransmissionControlProtocolb)TrivialConnectionProtocolc)TrafficControlProtocold)TelephonyConnectionProtocol29.UDPstandsforCa)UniversalDataProtocolb)UnreliableDatagramProtocolc)UserDatagramProtocol)UltimateDataProtocol30.BothTCPandUDPbelongtowhichlayeroftheOSImode?Ba)Sessionb)Transportc)Networkd)DataLink31.UDPofferswhichofthefollowingbenefitsrelativetoTCP?Aa)UDPconsumesfewercomputerresourcesbynotmaintainingconnectionstateb)UDPsupportsaself-regulating“throttle”featurethatpreventsnetworksaturationc)UDPguaranteesthatIndividualpacketsofatransmissionwillarrive“inorder”d)Noneoftheabove32.Whatisthemaximumrecommendedlengthoftwisted-pairEthernetcablesusedinhomeorbusinessnetworks?Ba)10metersb)100metersc)1000metersd)Other33.OnEthernetLANs,theEthernetaddressisalsoknownastheBa)IPaddressb)MACaddressc)Virtualaddressd)Other34.HowlongisaMACaddress?Ba)4bytesb)6bytesc)8bytesd)10bytes35.WhatisthebasicunitofEthernettraffic?Ba)Fileb)Framec)Packetd)Stream36.CSMA/CDstandsforAa)CarrierSenseMultipleAccesswithCollisionDetectionb)CollisionSenseMultipleAccesswithCarrierDetectionc)CarrierSingle-MultipleAccesswithCollisionDetectiond)CollisionSingle-MultipleAccesswithCarrierDetection)ARPb)DNSc)BGPd)SMTP38.Whichofthefollowingalgorithmhasthesocalledcount-to-infinityproblem?Ca)Floodingalgorit