What are the two main components of an interaction in VoIP?

• A. Audio and Video
• B. Signaling and Video
• C. Signaling and Audio
• D. Audio and Control

Answer: (C)

In a Voice over IP (VoIP) interaction, the two main components are signaling and audio. Signaling is crucial as it encompasses the methods and protocols used to establish, manage, and terminate the communication session. This includes tasks like setting up the call, handling call transfers, and managing call features. Audio, on the other hand, refers to the actual voice data transmitted between the parties involved in the call.

These two components work together to facilitate effective communication over the internet. While audio is fundamental for transmitting the voice content, signaling ensures that the communication is properly established and maintained throughout the call.

The other options introduce components that, while relevant in various contexts, do not specifically capture the core requirements for VoIP interactions. For example, video may be part of a multimedia interaction but is not essential for all VoIP calls, while control, while important within the realm of call management, does not specifically denote a separate component of VoIP interactions as clearly as signaling and audio do.