The ACME company has an AOS-CX 6200 VSF switch stack with an uplink over subscription ratio of 9.6.1 They have indicated that their low-priority TCP traffic has been flagged with a DSCP marking…

Question

Exhibits

Options

• Aedge mark lower priority TCP traffic with AF12
• Bedge mark critical UDP Traffic with CSS
• Cedge mark lower priority TCP traffic with AF11
• Dedge mark critical UDP traffic with AF42

• A
  10% (3)
• B
  3% (1)
• C
  6% (2)
• D
  81% (25)

Explanation

Given that the ACME company's concern is about UDP traffic potentially encountering packet drops due to uplink oversubscription, they need a strategy that prioritizes critical UDP traffic to Option D, edge mark critical UDP traffic with AF42, is the correct answer. Assured Forwarding (AF) classes provide a way to assign different levels of delivery assurance for IP packets. AF42 is typically used for traffic that requires low latency and low loss, such as voice and video, which often use UDP. Marking critical UDP traffic with AF42 will help ensure that this traffic is treated with higher priority over the network. Option A (edge mark lower priority TCP traffic with AF12) and Option C (edge mark lower priority TCP traffic with AF11) suggest marking lower priority TCP traffic, which does not directly address the concern for critical UDP traffic. Option B (edge mark critical UDP Traffic with CS5) suggests using Class Selector 5 for critical UDP traffic, which is also a valid approach but does not match the existing configuration that is focused on Assured Forwarding (AF) classes.

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