mirror of https://github.com/tLDP/LDP
43 lines
1.7 KiB
XML
43 lines
1.7 KiB
XML
<sect1 id="X25">
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<title>X25</title>
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<para>
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X.25 is a circuit based protocol developed in the 1970s for packet switching
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by the C.C.I.T.T. (a standards body recognized by Telecommunications
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companies in most parts of the world), allowing customers to share access to
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a PDN (Public Data Network). These networks, such as Sprintnet and Tymnet,
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were the most practical way to connect large companies at the time,
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and are still used by some companies. PDNs are networks that have local
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dial-up access points in cities throughout the country and use dedicated lines
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to network between these cities. Companies would dial up in two locations to
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connect their computers.
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</para>
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<para>
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Computers, routers, or other devices that access a PDN using the X.25
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protocols are called data terminal equipment, or DTEs. DTEs without built-in
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support for X.25 is a protocol with a relatively high overhead, since it
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provides error control and accounting for users of the network.
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</para>
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<para>
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The X.25 protocol supports speeds up to 64 Kbps. This makes it impractical for
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many networks, but it is an inexpensive alternative for low-bandwidth
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applications. X,25 is a protocol with a relatively high overhead, since it
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provides error control and accouting for users of the network.
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</para>
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<para>
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An implementation of X.25 and LAPB are being worked on and recent
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2.1.* kernels include the work in progress. Jonathon Naylor
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jsn@cs.nott.ac.uk is leading the development and a
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mailing list has been established to discuss Linux X.25 related
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matters. To subscribe send a message to: majordomo@vger.rutgers.edu
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with the text "subscribe linux-x25" in the body of the message.
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Early versions of the configuration tools may be obtained from
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Jonathon's ftp site at ftp.cs.nott.ac.uk.
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</para>
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</sect1>
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