Session Initiation Protocol (SIP) Certification Exam

Session Initiation Protocol (SIP) SIP stands apart because it zeroes in on real-time communication protocols—VoIP call setup, media negotiation, and session management—rather than treating networking as generic infrastructure. You’ll work with actual message flows, transaction timing, and edge cases like firewall traversal and codec selection that trip up unprepared candidates. Mastery here means understanding *why* calls drop or fail, not just knowing theoretical concepts.