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is a channel' s capacity which directly reflects the data transfer rate of the channel.(67)functions in a NetWare network which is used to define addressing schemes.(68)is a network layer device that suports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.(69)．is the popular LAN develped under the direction of the IEEE 802.3.(70)is a device which enables digital microcomputers to communicate across analog telephone lines.

A．The volume

B．The bandwidth

C．The noise

D．The delay

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