For each blank, choose the best answer from the four choices and write down on the answer sheet.
（）is a channel’s capacity which directly reflects the data transfer rate of the channel.
（）functions in a NetWare network which is used to define addressing schemes.
（）is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.
（）is the popular LAN developed under the direction of the IEEE802.3.
（）is a device which enables digital microcomputers to communicate across analog telephone lines.
（）is a channel’s capacity which directly reflects the data transfer rate of the channel.
A．The volume
B．The bandwidth
C．The noise
D．The delay