Connection-Oriented Network Service (CONS) is one of the two
Open Systems Interconnection (OSI)
network layer protocols, 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 destinatio ...
(CLNS). It is basically
X.25
X.25 is an ITU-T standard protocol suite for packet-switched data communication in wide area networks (WAN). It was originally defined by the International Telegraph and Telephone Consultative Committee (CCITT, now ITU-T) in a series of drafts a ...
, 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 data communication in wide area networks (WAN). It was originally defined by the International Telegraph and Telephone Consultative Committee (CCITT, now ITU-T) in a series of drafts a ...
, as specified i
ITU-T Recommendation X.223is a
Public Data Network 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 1975, which is used to set up and tear down telephone calls in most parts of the world-wide public switched telephone network (PSTN). The protocol also perform ...
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 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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