350-801 CLCOR: Implementing and Operating Cisco Collaboration Core TechnologiesDemo

By Cisco · Question Mode

QuestionQ70

Media and QoS

What results in poor voice quality and video pixelization during a video call?

  • A The QoS is configured incorrectly.
  • B A firewall is blocking the RTP ports.
  • C Cisco Unified Communications Manager is configured to use G.711 instead of G.729.
  • D 1 Gbps network ports are used instead of 100 Mbps network ports.
Explanation

Incorrect QoS can fail to prioritize real-time RTP voice and video traffic, allowing congestion to introduce delay, jitter, and packet loss. These impair voice quality, while video packet loss can prevent accurate frame reconstruction and cause pixelization. Cisco notes that interactive video has VoIP-like service requirements and that video is particularly sensitive to packet loss.

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