RFC 4961 · BEST CURRENT PRACTICE · 2007
SUN · 14 JUN 2026
Symmetric RTP / RTP Control Protocol
Overview
RFC 4961, “Symmetric RTP / RTP Control Protocol”, is a Best Current Practice document published in July 2007 by D. Wing. The canonical text is published by the RFC Editor.
Abstract
This document recommends using one UDP port pair for both communication directions of bidirectional RTP and RTP Control Protocol (RTCP) sessions, commonly called "symmetric RTP" and "symmetric RTCP". This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.
What “Best Current Practice” means
Documents the IETF community's recommended operational or procedural practice rather than a protocol specification.
Read this RFC
The canonical text of RFC 4961 is hosted at rfc-editor.org. Available in TXT,HTML.
Other RFCs from 2007
- RFC 4960 Stream Control Transmission Protocol
- RFC 4962 Guidance for Authentication, Authorization, and Accounting Key Management
- RFC 4959 IMAP Extension for Simple Authentication and Security Layer Initial Client Response
- RFC 4963 IPv4 Reassembly Errors at High Data Rates
- RFC 4958 A Framework for Supporting Emergency Telecommunications Services within a Single Administrative Domain
- RFC 4964 The P-Answer-State Header Extension to the Session Initiation Protocol for the Open Mobile Alliance Push to Talk over Cellular
- RFC 4957 Link-Layer Event Notifications for Detecting Network Attachments
- RFC 4965 CableLabs - IETF Standardization Collaboration