The(66)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.

The(68)is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.(69)is the popular LAN developed under the direction of the IEEE802.3.

The(70 is a device which enables digital microcomputers to communicate across analog telephone lines.

A．volume

B．bandwidth

C．noise

D．delay