SIP Stack Architecture

The SIP Stack Architecture is a layered framework that enables the implementation of the Session Initiation Protocol (SIP) in various applications, particularly those involving real-time communications like voice and video calls, messaging, and multimedia sessions. The architecture is designed to handle the signaling and control aspects required for establishing, managing, and terminating communication sessions over IP networks. Key components of the SIP Stack include: 

Transport Layer: This layer is responsible for the actual transmission of SIP messages across network protocols such as TCP, UDP, and SCTP, ensuring message integrity and proper routing.