What protocols are commonly used in VoIP and how do they function?

Your Answer

How To Answer This Question?

This question is designed to evaluate your understanding of the key protocols that enable VoIP communication. When answering, mention the most common protocols such as SIP (Session Initiation Protocol), RTP (Real-time Transport Protocol), and H.323. Briefly explain the role of each protocol:

• SIP: Used for signaling and controlling multimedia communication sessions. It helps in establishing, modifying, and terminating the sessions.
• RTP: Used for delivering audio and video over IP networks. It ensures real-time transmission of multimedia data.
• H.323: An older protocol suite for voice, video, and data communication over IP networks. It includes protocols for call signaling, control, and multimedia transport.

Provide examples of how these protocols work together in a VoIP system to ensure seamless communication. Highlight any experience you have with configuring or troubleshooting these protocols in real-world scenarios.