1) Routing Table Protocol A VINES routing protocol based on Routing Information Protocol (RIP). Distributes network topology information and aids Virtual Integrated Network Service (VINES) servers in finding neighboring clients, servers, and routers. Uses delay as a routing metric. See also SRTP. 2) Rapid Transport Protocol This provides pacing and error recovery for Advanced Peer-to-Peer Networking (APPN) data as it crosses the APPN network. With RTP, error recovery and flow control are done end-to-end rather than at every node. RTP prevents congestion rather than reacts to it. 3) Real-Time Transport Protocol This is commonly used with IP networks. RTP is designed to provide end-to-end network transport functions for applications transmitting real-time data, such as audio, video, or simulation data, over multicast or unicast network services. RTP provides such services as payload type identification, sequence numbering, timestamping, and delivery monitoring to real-time applications.