Connection-Oriented Network Service
Network layer protocol
From Wikipedia, the free encyclopedia
Connection-Oriented Network Service (CONS) is a service provided by the Open Systems Interconnection (OSI) network layer that establishes a virtual circuit for data exchange. It is one of the two primary OSI network-layer services, the other being Connectionless-mode Network Service (CLNS). CONS was largely influenced by X.25, and is formalized in the ISO standards ISO 8208 and ISO 8878,[1][2] but has been generalized and formalized, with adjustments to addressing, flow control, and error-handling mechanisms to conform to OSI standards.
Protocols providing CONS
Some protocols that provide the CONS service:
- X.25, as specified in ITU-T Recommendation X.223 is a Public Data Network protocol that provides the Connection Oriented Network Service as described in ITU-T Recommendation X.213.
- Signalling Connection Control Part (SCCP), as specified in ITU-T Recommendation Q.711 is a Signaling System 7 protocol that provides the Connection Oriented Network Service as described in ITU-T Recommendation X.213.
- Service Specific Connection Oriented Protocol (SSCOP), as specified in ITU-T Recommendation Q.2110 is an Asynchronous Transfer Mode protocol that provides the Connection Oriented Network Service as described in ITU-T Recommendation X.213.
