代理服务器和后端目录服务器之间的交互对于客户机是完全透明的。

The interaction between the proxy server and the back-end directory servers is entirely transparent to the clients.

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当然，在生产环境下，在物理上客户机应该与目录服务器分离。

Of course, in a production environment, your client would be physically separated from your directory server.

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环境中的客户机只知道前端的代理服务器，代理服务器背后的服务器集群对于客户机是隐藏的，客户机会看到统一的目录视图。

Since the clients in the environment are only aware of the front-end proxy server, the server cluster behind the proxy server remains hidden and a unified directory view is presented to the client.

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