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SIP – Session Initiation Protocol

Session Initiation Protocol (SIP) is an industry standard application-layer protocol that can initiate, manage and terminate Peer-to-Peer (P2P) communications and multimedia, including voice, video, email and instant messaging. SIP is similar to H.323 packet protocol, and originates in RFC 2543 of the Internet Engineering Task Force (IETF). SIP is increasingly being used in telephony, online gaming, and the growing virtual reality industry.

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