It is a standard ITU-T standard protocol.It consists of PSE packet switching exchange nodes.X.25 model is based on traditional telephony concept.
Frame Relay :
It is a packet switching telecommunication used for efficient data transfer which speeds up the transmission.It is used to connect LAN with public wide area networks.
Difference between of Frame Relay and X.25 :
|It has informal data rate||It has fixed data rate|
|It performs Multiplexing and switching at data link layer||It performs Multiplexing and switching at network layer|
|Frame Relay does not support Hop-to-Hop error and flow control.||It performs Hop-to-Hop error and flow control at data link layer.
|It does not support End-to-End flow and error control.||It performs End-to-End flow and error control at network layer|
|Congestion control is required in frame relay.||Congestion control is not required in X.25.|
|Call control signaling requires seperate logical connection from user data.||X.25 uses same data for call control signaling.|
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