Connection-Oriented Network Service (CONS) is one of the two
Open Systems Interconnection
The Open Systems Interconnection (OSI) model is a reference model developed by the International Organization for Standardization (ISO) that "provides a common basis for the coordination of standards development for the purpose of systems inter ...
(OSI)
network-layer protocol
In the seven-layer OSI model of computer networking, the network layer is layer 3. The network layer is responsible for packet forwarding including routing through intermediate routers.
Functions
The network layer provides the means of transf ...
s, the other being
Connectionless-mode Network Service
Connectionless-mode Network Service (CLNS) or simply Connectionless Network Service is an OSI network layer datagram service that does not require a circuit to be established before data is transmitted, and routes messages to their destination ...
(CLNS). It is basically
X.25
X.25 is an ITU-T standard protocol suite for Packet switched network, packet-switched data communication in wide area network, wide area networks (WAN). It was originally defined by the CCITT, International Telegraph and Telephone Consultative Co ...
, with a few adjustments.
Protocols providing CONS
Some protocols that provide the CONS service:
*
X.25
X.25 is an ITU-T standard protocol suite for Packet switched network, packet-switched data communication in wide area network, wide area networks (WAN). It was originally defined by the CCITT, International Telegraph and Telephone Consultative Co ...
, as specified i
ITU-T Recommendation X.223is a
Public Data Network
A public data network (PDN) is a network established and operated by a telecommunications administration, or a recognized private operating agency, for the specific purpose of providing data transmission services for the public.
The first public ...
protocol that provides the Connection Oriented Network Service as described i
ITU-T Recommendation X.213
*
(SCCP), as specified i
ITU-T Recommendation Q.711is a
Signaling System 7
Signalling System No. 7 (SS7) is a set of telephony signaling protocols developed in the 1970s that is used to setup and teardown telephone calls on most parts of the global public switched telephone network (PSTN). The protocol also performs ...
protocol that provides the Connection Oriented Network Service as described i
ITU-T Recommendation X.213
*
Service Specific Connection Oriented Protocol (SSCOP), as specified i
ITU-T Recommendation Q.2110is an
Asynchronous Transfer Mode
Asynchronous Transfer Mode (ATM) is a telecommunications standard defined by the American National Standards Institute and International Telecommunication Union Telecommunication Standardization Sector (ITU-T, formerly CCITT) for digital trans ...
protocol that provides the Connection Oriented Network Service as described i
ITU-T Recommendation X.213
OSI protocols
Network layer protocols
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