What do SIP headers provide?

SIP headers play a crucial role in the signaling protocol for initiating, maintaining, and terminating real-time sessions in IP networks. They are designed to convey additional information about the requests or responses associated with SIP messages. This can include details such as the originating and destination addresses, session parameters, content types, and various options that affect the communication path, such as codecs supported or call priorities. By providing this additional context, SIP headers facilitate a more effective and flexible communication experience.

While connection settings, authentication, and security features are important aspects of SIP, they are more specialized and do not encompass the full range of information that SIP headers can convey. Therefore, the correct answer focuses on the comprehensive role of SIP headers in enriching the communication process with various types of relevant data.