Implementing Cisco Collaboration Core Technologies (CLCOR 350-801) Practice Test

What are the typical effects of packet loss on VoIP voice quality?

Choppiness, missing syllables, and concealment artifacts Jitter only Higher bandwidth usage No perceptible effect

Correct Answer:

Choppiness, missing syllables, and concealment artifacts

Explanation:

Packet loss directly creates gaps in the audio stream. When voice packets are dropped, parts of speech disappear, so the call sounds choppy and syllables can be missing. To hide these gaps, receivers apply packet loss concealment, which fills in the gaps with interpolations or repeats, producing concealment artifacts such as muffled or stuttering sounds. Jitter is about timing variation, not actual loss, and higher bandwidth usage isn’t a direct result of packet loss in real-time VoIP, while no perceptible effect is unlikely once loss occurs. So the typical effects you hear are choppiness, missing syllables, and concealment artifacts.

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