A local-area network(LAN) is a communications network that { A } a variety of devices and provides a { B }for information exchange among those devices. The scope of the LAN is small typically a single building or a cluster of builings. The LAN is usually owned by the same organlization that owns the { C } devices.The internal data rate of LAN is at least several Mbit/s. The basic of LAN communciation is broadcasting. At each station, there is a transmitter/receiver that commuinciates over a { D }shared by other stations. A transmission from any one station is { E }to an received by all other stations.

　　供選擇的答案

　　A、B、D、E：①broadcast ②cable ③control ④interconnects

　?、輎nternet ⑥meander ⑦means ⑧medium

　?、醡odem ⑩output 11. switch 12. relay

　　C：①adopted ②attached ③selected ④unified

　　【解析】

　　參考譯文：局域網(wǎng)是將許多設(shè)備互連在一起并提供一種在這些設(shè)備間交換信息的方法的通信網(wǎng)。局域網(wǎng)的范圍通常比較小，如一個建筑物或一群建筑物。局域網(wǎng)通常為擁有那些連接在網(wǎng)上的設(shè)備的同一組織所擁有。局域網(wǎng)的內(nèi)部傳輸率至少為幾兆字節(jié)每秒。局域網(wǎng)的基本通訊方式為廣播方式。每個站都有一個轉(zhuǎn)發(fā)/接收器，通過一個與其他站共享的媒介來通訊。從任何一個站發(fā)送的消息都被廣播發(fā)送到所有的站，被所有的站接收。

　　【答案】A：④ B：⑦ C：② D：⑧ E：①

【相關(guān)文章】

1. 軟考英語練習十三（附原文與譯文）