互联网工作原理(15.DSL是如何告诉连接的)

互联网工作原理(15.DSL是如何告诉连接的)_第1张图片

 

One of the major benefits of DSL is that it doesn't need any special wires. It is delivered over existing copper phone lineswhat is often referred to as POTS, or the plain old telephone system. DSL, in fact, refers to the modems being used, not to the lines themselves.

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