TCP/IP(请作答此空)layerprotocolsprovideservicestotheapplication()runningonacomputer.Theapplicationlayerdoesnotdefinetheapplicationitself,butratheritdefines()thatapplicationsneed--liketheabilitytotransferafileinthecaseofHTTP.Inshort,theapplicationlayerprovidesan()betweensoftwarerunningonacomputerandthenetworkitself.TheTCP/IPapplicationlayerincludesarelativelylargenumberofprotocols,withHTTPbeingonlyoneofthose.TheTCP/IP()layerconsistsoftwomainprotocoloptions--theTransmissionControlProtocol(TCP)andtheUserDatagramProtocol(UDP).
A.application
B.transport
C.link
D.network
正确答案是A