According to QoS guidelines, what is the packet loss for streaming video?

Question

Options

• ANot more than 8%
• BNot more than 1%
• CNot more than 3%
• DNot more than 5%

• B
  5% (1)
• C
  5% (1)
• D
  89% (17)

Explanation

Cisco QoS design guidelines distinguish between interactive video (real-time, bidirectional) and streaming video (one-way, buffered). Streaming video is far more tolerant of packet loss because players use large buffers and can compensate for missing packets through retransmission or interpolation. The Cisco-recommended tolerance for streaming video is up to 5% packet loss. By contrast, interactive video (videoconferencing) and voice both require packet loss below 1% because they are real-time and cannot buffer or retransmit. Understanding these per-class tolerances - loss, delay, and jitter - is essential for QoS exam topics and for correctly classifying and queuing traffic in a collaboration deployment.

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