Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A bandwidth cap, also known as a bit cap, limits the transfer of a specified amount of data over a period of time. Internet service providers commonly apply a cap when a channel intended to be shared by many users becomes overloaded, or may be overloaded, by a few users. Implementation of a bandwidth cap is sometimes termed a Fair Access Policy. Many ISPs engineered their facilities in the 1990s to use dynamic capacity allocation to serve multiple bursty users. Each user is expected to use high speed transmission for only a short time, for example to download a megabyte web page in less than a second.

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