First, it establishes the session by sending messages in the form of data packets between two or more identified IP endpoints or SIP addresses. SIP contributes to voice and video calls by initiating and terminating an IP communication session. SIP is media-independent, meaning it’s not specifically for voice, video, or data it simply could be any form of communication. SIP is critical for the consistent standardization of different multimedia forms of communication over the internet. How does SIP contribute to voice and video calls? SIP creates the modern foundation of interactive communications, like voice calls, video calls, and more. SIP provides an overall common framework for communication sessions over the internet. Protocols are a set of rules that define how two or more computing devices, such as laptops, smartphones, routers, network switches, and more, communicate with each other. SIP is the application layer protocol that initiates, maintains, and terminates IP-based calls. In this article, we’ll discuss exactly what SIP is, how it works, how it differs from other communication protocols, and the benefits of using SIP in modern communications. SIP was meant to establish easy communication regardless of the underlying technology or devices. With the adoption and growth of the internet, there was a need for a standardized and flexible protocol that could enable various forms of communication over different IP networks. In the late 1990s and early 2000s, internet usage was exploding, with 41% of adults going online for the first time in 1998. SIP was first developed by the Internet Engineering Task Force in 1996 to facilitate real-time communication sessions over the internet. SIP stands for "session initiation protocol” and enables voice, messaging, video, and other types of communication through application layer protocols.
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