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邮电通讯系统 2022-07-27 53 0star收藏 版权: . 保留作者信息 . 禁止商业使用 . 禁止修改作品
通信子网为网络源节点和目的节点提供了多条传输路径的可能性。网络节点在收到一个分组后后,要判定向下一节点传送的路径,这便是路由选择。在数据报方法中,网络节点要为每个分组路由做出选择;而在虚电路方法中,只需在连接搭建时判定路由。判定路由选择的策略称路由算法

(The communication subnet provides the possibility of multiple transmission paths for the source and destination nodes of the network. After a network node receives a packet, it needs to determine the path to transmit to the next node, which is routing. In the datagram method, the network node has to make a choice for each packet route; in the virtual circuit method, the route need only be determined when the connection is established. The strategy for determining route selection is called a routing algorithm.)

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