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350-801 · Question #468

In a Dual Video Queue approach, what is the purpose of the CS4 class for Cisco video devices?

The correct answer is D. Immersive video traffic is marked with CS4 and placed in a CBWFQ separate from desktop video. In a Dual Video Queue approach, the CS4 class is specifically used for immersive video traffic, separating it into a Class-Based Weighted Fair Queuing (CBWFQ) from desktop video traffic. This allows for differentiated treatment of high-quality immersive video.

Infrastructure and Quality of Service

Question

In a Dual Video Queue approach, what is the purpose of the CS4 class for Cisco video devices?

Options

  • ADesktop video traffic needs strict priority queuing marked with CS4 class
  • BCreate a simpler provisioning with one CBWFQ for desktop and immersive video traffic
  • CEnforce a strict priority queueing for both desktop and immersive video traffic
  • DImmersive video traffic is marked with CS4 and placed in a CBWFQ separate from desktop video

How the community answered

(43 responses)
  • A
    2% (1)
  • B
    7% (3)
  • C
    2% (1)
  • D
    88% (38)

Why each option

In a Dual Video Queue approach, the CS4 class is specifically used for immersive video traffic, separating it into a Class-Based Weighted Fair Queuing (CBWFQ) from desktop video traffic. This allows for differentiated treatment of high-quality immersive video.

ADesktop video traffic needs strict priority queuing marked with CS4 class

CS4 is typically used for immersive video, not desktop video traffic, and desktop video usually has different QoS requirements.

BCreate a simpler provisioning with one CBWFQ for desktop and immersive video traffic

The Dual Video Queue approach aims to differentiate and separate desktop and immersive video traffic for better QoS, not to simplify provisioning with a single CBWFQ for both.

CEnforce a strict priority queueing for both desktop and immersive video traffic

While strict priority queuing might be applied to certain high-priority traffic, CS4 itself primarily indicates Assured Forwarding, and the Dual Video Queue approach aims for differentiated CBWFQ for immersive video, not necessarily strict priority for both.

DImmersive video traffic is marked with CS4 and placed in a CBWFQ separate from desktop videoCorrect

Immersive video traffic is typically marked with CS4 (Assured Forwarding Class 4) and is placed in a dedicated Class-Based Weighted Fair Queuing (CBWFQ) to ensure appropriate bandwidth and fair treatment, distinct from desktop video traffic. This separation allows for effective Quality of Service (QoS) management for different video types.

Concept tested: Dual Video Queue QoS for Cisco video

Source: https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Collaboration/cisco-collaboration-srnd.html

Topics

#QoS#Video Classification#DSCP#CBWFQ

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