Foreachblank，choosethebestanswerfromthefourchoicesandwritedownontheanswersheet. ()isasixbytesOSIlayer2addresswhichisburnedintoeverynetworkingdevicethatprovidesitsuniqueidentityforpointtopointcommunication. ()isaprofessionalorganizationofindividualsinmultipleprofessionswhichfocusesoneffortonlower-layerprotocols. ()functionswithtwolayersofprotocols.ItCanconnectnetworksofdifferentspeedsandcanbeadaptedtoanenvironmentasitexpands. (请作答此空)isthepopularLANdevelopedunderthedirectionoftheIEEE802.5. ()isthepopularbackbonetechnologyfortransmittinginformationathighspeedwithahighleveloffaulttolerancewhichisdevelopedunderthedirectionofANSI.
A.Ethernet
B.Token Bus
C.Token Ring
D.DQDB
正确答案是C