路由器可以创建或维护一个包含可用路由及其状态的路由表，同时根据这些信息，利用距离和成本算法为数据包选择最佳路由。

A router may create or maintain a table of the available routes and their conditions and use this information along with distance and cost algorithms to determine the best route for a given packet.

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当这些需求需要使用ESB基本功能(如消息路由、转换或协议中介)之一时，则ESB是最佳选择。

If the requirements call for one of the basic ESB functions, such as message routing, transformation or protocol mediation, an ESB would be the clear choice.

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路由选择采用K条最短路径算法进行，备选路由集中首选最佳路由时考虑链路的代价、跳数和每一个链路上不可用波长数。

We adopt K shortest paths into routing and choose the best route in them considering link costs, links hops and the number of noutilized wavelength in a link.

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