(RTSP) An {application layer} {protocol} for controlling delivery of a {stream} of real-timemultimedia content. RTSP allows users to start playing from a certain position. It does not actually deliver the data, but works alongside existing delivery channels such as UDP, TCP, or IP multicast. RTSP was developed by RealNetworks, {Netscape Communications}, and {Columbia University}, and is described in RFC 2326, April 1998. RTSP is an IETF proposed standard. {FAQ (http://www.real.com/devzone/library/fIReprot/rtsp/faq.html)}. (1999-08-26)