H12-891_V1.0 Exam Dumps | In addition to indicating priority, the DSCP value can also indicate the drop probability. Which of the

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Question 76/85

In addition to indicating priority, the DSCP value can also indicate the drop probability. Which of the following DSCP values is set with the highest drop probability?

A. AF43

B. AF10

C. AF12

D. AF11

Correct Answer: A

Understanding DSCP & Assured Forwarding (AF) Classes
* DSCP (Differentiated Services Code Point) is used for QoS (Quality of Service) classification in IP packet headers.
* Assured Forwarding (AF) classes provide four traffic classes (AF1x, AF2x, AF3x, AF4x).
* Each AF class has three drop precedence levels (Low = 1, Medium = 2, High = 3).
A screenshot of a computer AI-generated content may be incorrect.

Analysis of Options:
* AF43 (Answer A) # Class 4, High Drop (Highest priority, highest drop probability) #
* AF10 (Answer B) # Class 1, Low Drop (Lowest priority, lowest drop probability) #
* AF12 (Answer C) # Class 1, Medium Drop Probability #
* AF11 (Answer D) # Class 1, Low Drop Probability #
Why AF43?
* Highest priority traffic within AF Class 4.
* Highest drop probability (x3) means packets are dropped first under congestion.
* Used for premium but non-essential services (e.g., bulk data transfer, backups).
# Reference: Huawei HCIE-Datacom Guide - QoS & DSCP Marking

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