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Total Tutorials: 5354  |  Added today: 0 Tutorials updated: 02/03/2012



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X.21 Overview
 
X.21 is a state-driven protocol running full duplex at 9600 bps to 64 Kbps with subscriber networks. It is a circuit-switching protocol using Synchronous ASCII with odd parity to connect and disconnect a subscriber to the public-switching network.
Added: 05/31/2000, Hits: 306, Rating: 0, Votes: 0
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X.25
 
This chapter covers the basic functions and components of X.25
Added: 05/08/2000, Hits: 349, Rating: 0, Votes: 0
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X.25 Protocol
 
X.25 is a packet switched data network protocol which defines an international recommendation for the exchange of data as well as control information between a user device (host), called Data Terminal Equipment (DTE) and a network node, called Data Circuit Terminating Equipment (DCE).
Added: 05/08/2000, Hits: 889, Rating: 0, Votes: 0
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