Abbreviations

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SIP
SIP is distinguished by its proponents for having roots in the Internet community rather than in the telecommunications industry. It has been standardized primarily by the IETF, while other protocols have traditionally been associated with the ITU.
SIP is used in Internet telephony, in private IP telephone systems, as well as mobile phone calling over LTE (VoLTE).[
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Session Initiation Protocol
SIP is designed to be independent of the underlying transport layer protocol and can be used with the UDP, the TCP, and the SCTP. For secure transmissions of SIP messages over insecure network links, the protocol may be encrypted with TLS.
SIP clients typically use TCP or UDP on port numbers 5060 or 5061 for SIP traffic to servers and other endpoints. Port 5060 is commonly used for non-encrypted signaling traffic whereas port 5061 is typically used for traffic encrypted with TLS.
QUIC
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Quick UDP Internet Connections
UDP
UDP is officially defined in RFC 768 and was formulated by David P. Reed.
UDP network traffic is organized in the form of datagrams, which comprise one message units. The first eight bytes of a datagram contain header information, while the remaining bytes contain message data.
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User Datagram Protocol
UDP is widely used in video conferencing and real-time computer games. The protocol permits individual packets to be dropped and UDP packets to be received in a different order than that in which they were sent, allowing for better performance.
User datagram protocol is an open systems interconnection (OSI) transport layer protocol for client- server network applications.
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