X.25




<protocol, standard> An ITU-T standard protocol suite for the DTE-DCE interface in a packet-switched network, approved by ISO.

X.25 defines standard physical layer, data link layer and network layers (layers 1 through 3). It was developed to describe how data passes into and out of public data communications networks.

X.25 networks are in use throughout the world.

Document: ISO 8208.

Several other ITU-T recommendations are relevant to packet switching: X.3, X.28, X.29, X.75.



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X.224
X.225
X.226
X.227
X.229
amateur packet radio
Basic Rate Interface
CSNET
Datakit
DS level
X.28
X.29
X.3
X3J16
X3T10