●For each blank, choose the best answer from the four choices and write down on the answer sheet.

(71) is a channel's capacity which directly reflects the data transfer rate of the channel.

(72) functions in a NetWare network which is used to define addressing schemes.

(73) is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.

(74) is the popular LAN developed under the direction of the IEEE802.3.

(75) is a device which enables digital microcomputers to communicate across analog telephone lines.

(71) A．The volume

B．The bandwidth

C．The noise

D．The delay

(72) A．NetBEUI

B．IP

C．IPX

D．NCP

(73) A．The repeater

B．The hub

C．The bridge

D．The router

(74) A．Token Ring

B．Token Bus

C．Ethernet

D．FDDI

(75) A．The repeater

B．The modem

C．The hub

D．The printer

正確答案：

B,C,D,C,B【解析】帶寬是指信道的容量，能夠直接反映出信道數據傳輸速率。作用在Netware網絡中，用以定義尋址方法。路由器是網絡層設備，它支持多局域網接口并能夠把局域網分為更小沖突域和廣播域。以太網是流行的網絡，它是在IEEE802.3標準的基礎上發(fā)展起來的。調制解調器是一種能使得數字信號通過模擬線路進行通信的設備。