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TCP/IP Guide by Charles M. Kozierok

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PPP Compression Control Protocol (CCP) and Compression Algorithms

PPP is primarily used to provide data link layer connectivity to physical serial links. One of the biggest problems with serial links compared to many other types of layer 1 connections is that they are relatively slow. Consider that while 10 Mbps regular Ethernet is considered sluggish by modern LAN standards, it is actually much faster than most serial lines used for WAN connectivity, which can be ten, one hundred, or even one thousand times slower.

One way to improve performance over serial links is to compress the data sent over the line. Depending on the data transferred, this can double the performance compared to uncompressed transmissions, and can, in some cases, do even ...

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