For each blank, choose the best answer from the four choices and write down on the answer sheet. (71)is a channel’ s capacity wh

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问题 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. 

选项 A、The repeater
B、The modem
C、The hub
D、The printer

答案B

解析 带宽是指信道的容量,能够直接反映出信道数据传输速率。作用在Netware网络中,用以定义寻址方法。路由器是网络层设备,它支持多局域网接口并能够把局域网分为更小冲突域和广播域。以太网是流行的网络,它是在IEEE802.3标准的基础上发展起来的。调制解调器是一种能使得数字信号通过模拟线路进行通信的设备。
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