每个节点通常承载不超过一个或两个的相关应用程序，因此链路授权大致等价于驻留在其中的应用程序的授权。
Each node typically hosted no more than one or two related applications so authorizing a link was roughly equivalent to authorizing the application residing there.
通过多条等价链路实现流量的负载分担，是大型IP网络设计的基本方法。
Load sharing among multiple equal cost paths is a basic method in large IP networks design.
进而，我们将目标等价转化为最大化由代理任命而引起的总链路传输次数减少量。
Further, we convert our goal into an equivalent of maximizing the reduction in the number of total link transmissions incurred by the placement of proxies.
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