题目内容:
根据下列题干,回答题:Frame Relay is simplified form of( 1 ) ,similar in principle to( 2 ), in which synchronous,frames of data are routed to different destinations depending on header information .Packets are routed throught one or more Virtual Circuits known as( 3 ).Most Virtual Circuits are( 4 ),which means that the network provider sets up all DLCI connections at subscription time.( 5 ) are also part of the Frame Relay specification .They privide a link that only lasts only as long as the session.
请选择(1)处最佳答案:
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答案解析: