A local-area network(LAN)is a communications network that(125)a variety of devices and provides a(126)for information exchange a

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问题 A local-area network(LAN)is a communications network that(125)a variety of devices and provides a(126)for information exchange among those devices. The scope of the LAN is small typically a single building or a cluster(丛)of buildings. The LAN is usually owned by the same organization that owns the(127)devices. The internal data rate of LAN is at least several Mb/s.The basic of LAN communication is broadcasting. At each station, there is a  transmitter/receiver that communicates over a(128)shared, By other stations. A transmission from any one station is(129)to and received by all other stations.

选项 A、broadcast
B、cable
C、control
D、means
E、internet

答案D

解析
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