The so-called routing means connected via a network of mutual information from the source location to move to the target site activity. In general, the routing process, the information at least through one or more intermediate nodes. Usually, people will compare routing and switching, mainly because the normal user appears to function both achieved exactly the same. In fact, routing and switching is the main difference between the exchange occurred in the second layer of OSI reference model (data link layer), while the route took place in the third layer, that is, the network layer. This difference determines the routing and switching in the process of mobile information need to use a different control information, so the two ways to achieve their functionality is different.
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Finally, now that we introduced all the required concepts, we can define the routing process.
前面介绍了所有必要概念，现在终于可以定义路由过程了。
The routing process begins with an IP address that is unique to the sending end station .
路由过程始于对发送端站而言是唯一的一个ip地址。
The following prompt box (see figure 14) is displayed if the message has not completed the routing process.
如果尚未完成发送进程，则会显示下面的提示框(参见图14)。
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