High Quality Content by WIKIPEDIA articles! A connection-oriented networking protocol is one that delivers a stream of data in the same order as it was sent, after first establishing a communication session. It may be a circuit switched connection, or a virtual circuit connection in a packet switched network. In the latter case, it identifies traffic flows by some connection identifier rather than by explicitly listing source and destination addresses. Typically, this connection identifier is a small integer (10 bits for Frame Relay, 24 for ATM, for example). This makes network switches substantially faster (as routing tables are just simple look-up tables, and are trivial to implement in hardware). The impact is so great, in fact, that even characteristically connectionless protocols, such as IP traffic, are being tagged with connection-oriented header prefixes (e.g., as with MPLS, or IPv6's built-in Flow ID field). Example of a connection-oriented protocol at the transport layer is the TCP protocol.

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