CREST Practitioner Security Analyst (CPSA) 2025 – 400 Free Practice Questions to Pass the Exam

The correct answer is "Session Initiation Protocol." SIP is a signaling protocol used to initiate, maintain, and terminate real-time sessions that include voice, video, and messaging applications. It plays a crucial role in Internet telephony and multimedia communication, allowing endpoints (such as phones, computers, and other devices) to establish connections for communication sessions over IP networks.

SIP is essential for various applications, including Voice over IP (VoIP) services, as it provides the necessary framework for signaling and controlling multimedia communication sessions. It operates similarly to traditional telephone systems but leverages the Internet's capabilities to manage multimedia traffic efficiently.

The other mentioned terms do not accurately reflect the standard terminology associated with network communication protocols. While some may sound similar or could fit within a broader context, they do not represent the widely accepted meaning of SIP in telecommunications and internet protocols.