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 the popular LAN developed under the direction of the IEEE802.3.

A．Token Ring

B．Token Bus

C．Ethernet

D．FDDI

（）类客户十分重视产品和品牌的宣传，宣传投入大。