350-501 Automation and Quality of Services Practice Question
Which MPLS EXP bits value is typically mapped from DSCP EF at the ingress PE to maintain voice QoS in an MPLS network?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
EXP 5
DSCP EF (46) is commonly mapped to MPLS EXP 5 to preserve priority across the MPLS core.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
EXP 3
Why it's wrong here
EXP 3 is often used for AF31.
- ✓
EXP 5
Why this is correct
EXP 5 is the standard mapping for voice traffic.
- ✗
EXP 7
Why it's wrong here
EXP 7 is rarely used; EXP 5 is typical for EF.
- ✗
EXP 0
Why it's wrong here
EXP 0 is Best Effort.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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