Transport Options
Despite the widespread use of RTP over UDP for audio and video streaming, the experts are still at work on Transport layer options that address the fundamental unsuitability of either TCP or UDP for streaming situations.
Stream Control Transmission Protocol (SCTP), which is described in RFC 2000 and later documents, is a connection-oriented transport protocol (and thus more similar to TCP), but, like UDP, SCTP is more message-oriented. SCTP also offers the capability to maintain several message streams in parallel through a single connection.
Datagram Congestion Control Protocol (DCCP), which is described in RFC 4340, also borrows features from both TCP and UDP. DCCP is connection-oriented (like TCP), with fast but unreliable ...
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