Definitions for "X.25"
Keywords:  ccitt, dte, packet, dce, itu
A WAN standard for protocols and message formats. Used to access public packet switching networks.
An older technique for data-networking. X.25 is relatively slow. The Dutch Datanet1 for example uses X.25 as do many Internet servers.
A CCITT Recommendation that defines the physical level (physical layer), link level (data link layer), and packet level (network layer) of the OSI reference model. An X.25 network is an interface between data terminal equipment (DTE) and data circuit-terminating equipment (DCE) operating in the packet mode, and connected to public data networks by dedicated circuits. X.25 networks use the connection-mode network service.