EC-Council Certified Security Specialist (ECSS) Practice Test

Session Initiation Protocol is the signaling protocol used to establish, modify, and terminate real-time multimedia sessions between endpoints, such as voice and video calls over IP. It handles the invitation and negotiation process that starts a session and can manage multiple simultaneous sessions through features like call forking and multiparty conferencing. In practice, the signaling is separate from the media itself, which is usually carried later by the Real-time Transport Protocol, while SIP takes care of who is talking to whom, where they are, and what capabilities they have. This makes SIP the standard choice for session initiation and multi-session management.