SIP is a text-based protocol, incorporating many elements of the Hypertext Transfer Protocol (HTTP) and the Simple Mail Transfer Protocol (SMTP). SIP is used for signaling and controlling multimedia communication sessions in applications of Internet telephony for voice and video calls, in private IP telephone systems, in instant messaging over Internet Protocol (IP) networks as well as mobile phone calling over LTE (VoLTE).The protocol defines the specific format of messages exchanged and the sequence of communications for cooperation of the participants. From Wikipedia, the free encyclopedia Jump to navigation Jump to search Internet protocol suiteApplication layerBGPDHCPDNSFTPHTTPHTTPSIMAPLDAPMGCPMQTTNNTPNTPPOPONC/RPCRTPRTSPRIPSIPSMTPSNMPSSHTelnetTLS/SSLXMPPmore.Transport layerTCPUDPDCCPSCTPRSVPmore.Internet layerIPIPv4IPv6ICMPICMPv6ECNIGMPIPsecmore.Link layerARPNDPOSPFTunnelsL2TPPPPMACEthernetWi-FiDSLISDNFDDImore.vteThe Session Initiation Protocol (SIP) is a signaling protocol used for initiating, maintaining, and terminating real-time sessions that include voice, video and messaging applications.
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