220-801 Question #255: Real Exam Question with Answer & Explanation

The correct answer is D: VoIP. VoIP (Voice over Internet Protocol) relies on two key protocols: SIP (Session Initiation Protocol) for establishing, managing, and terminating calls, and RTP (Real-time Transport Protocol) for transmitting the actual audio data in real time. A bridge operates at Layer 2 to connec

Question

Which of the following uses RTP or SIP for communication between devices?

Options

ABridge
BNAS
CModem
DVoIP

Explanation

VoIP (Voice over Internet Protocol) relies on two key protocols: SIP (Session Initiation Protocol) for establishing, managing, and terminating calls, and RTP (Real-time Transport Protocol) for transmitting the actual audio data in real time. A bridge operates at Layer 2 to connect network segments and uses no voice protocols. A NAS (Network Attached Storage) provides file-level storage over a network and uses protocols like SMB or NFS. A modem modulates and demodulates signals for transmission over telephone or cable lines and does not use SIP or RTP.

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