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X.25
Last modified: Tuesday, May 01, 2001 

A popular standard for packet-switching networks. The X.25 standard was approved by the CCITT (now the ITU) in 1976. It defines layers 1, 2, and 3 in the OSI Reference Model.

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For internet.com pages about X.25 . Also check out the following links!

Related Links

Pacific Bell's FasTrak X.25
Provides information about Pacific Bell's FasTrak X.25 service.

X.25 packet switching
Provides a good overview of X.25 packet switching.

X.25 Protocol Overview
A brief history of the X.25 protocol along with details on the physical, link, and packet levels.

related categories

Networking Standards

related terms

CCITT

cloud

packet switching


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