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( )is the popular LAN developed under the direction of the IEEE 802.5.( )is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.

AEthernet,FDDI

BToken Bus,Ethernet

CToken Ring,FDDI

DDQDB,QinQ

正确答案:A (备注:此答案有误)

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