经过几番修改，我引入了端口(Port)的概念(实际上在组件技术以及UML中，这是一个众所周知的概念，但是相对于我的客户而言，却是一个新名词)。

After some tinkering around, I introduced the concept of ports (this is actually a well-known concept in component technology and also UML, but was relatively new to my customer).

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通常，所有的服务器进程都侦听众所周知的端口号。

Normally, all the server processes listen on a well-known port number.

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其中有一些端口是众所周知的(例如，端口80用于HTTP)。

Some of these ports are well-known (for example, port 80 is used for HTTP).

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