What is Session Initiation Protocol SIP?
Session Initiation Protocol SIP Definition: Is designed to manage multimedia connections.
Understanding Session Initiation Protocol SIP
Is designed to manage multimedia connections. SIP is a signaling protocol used for initiating maintaining and terminating real-time communication sessions involving voice video messaging and other multimedia elements. It handles session establishment modification and termination in IP-based networks working with other protocols like RTP for media transport. SIP specifications are defined in RFC 3261 and related RFCs with security considerations in RFC 3261 and subsequent extensions. Organizations secure SIP through encryption TLS SRTP authentication mechanisms topology hiding session border controllers and monitoring for VoIP-specific threats. For example an enterprise might implement a secure VoIP infrastructure using SIP over TLS for signaling encryption SRTP for media encryption SIP authentication requirements session border controllers at network boundaries and specialized VoIP security monitoring to protect against threats like toll fraud and call hijacking. Related terms VoIP Unified Communications RTP SDP SIP trunk Voice security Media gateway Call control Session border controller.