Typically，anIPaddressreferstoanindividualhostonaparticularnetwork.IPalsoaccommodatesaddressesthatrefertoagroupofhostsononeormorenetworks.Suchaddressesarereferredtoasmulticastaddresses，andtheactofsendingapacketfromasourcetothemembersofa(71)groupisreferredtoasmulticasting.Multicastingdone(72)thescopeofasingleLANsegmentisstraightforward.IEEE802andotherLANprotocolsincludeprovisionforMAC-levelmulticastaddresses.ApacketwithamulticastaddressistransmittedonaLANsegment.Thosestationsthataremembersofthe(73)multicastgrouprecognizethemulticastaddressand(74)thepacket.Inthiscase,onlyasinglecopyofthepacketisevertransmitted.Thistechniqueworksbecauseofthe(本题)natureofaLAN:AtransmissionfromanyonestationisreceivedbyallotherstationsontheLAN.
A.multicast
B.unicast
C.broadcast
D.multiple unicast
正确答案是C