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Exam 300-420 topic 1 question 307 discussion

Actual exam question from Cisco's 300-420
Question #: 307
Topic #: 1
[All 300-420 Questions]

A customer requires QoS to support multimedia conferencing over MPLS. The network architect chooses to use per-hop behavior. Which solution must the architect use to classify and mark traffic traveling between branch sites?

  • A. BW Queue with DSCP AF3
  • B. BW Queue and DSCP WRED with DSCP AF4
  • C. BW Queue and DSCP WRED with DSCP AF3
  • D. BW Queue with DSCP AF4
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Suggested Answer: B 🗳️
by 08511d4 at June 16, 2024, 8:43 p.m.

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Aandreyy1
6 months, 1 week ago
Selected Answer: C
SCP AF3 (Assured Forwarding class 3) is part of the Assured Forwarding (AF) PHB group, which is commonly used for multimedia applications like voice and video.
upvoted 1 times
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PicoOstrava
6 months, 3 weeks ago
Selected Answer: D
I think that for multimedia conferencing, which is sensitive to delay and requires low packet loss, applying WRED might introduce variability in packet drops that could negatively impact the user experience.
upvoted 2 times
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08511d4
11 months, 3 weeks ago
Selected Answer: B
Surely WRED is best practice
upvoted 3 times
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