350-501 Automation and Quality of Services Practice Question
When DSCP markings are mapped to MPLS EXP bits at the ingress PE router, how many EXP values are available for traffic differentiation in the MPLS core?
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
✓
8
MPLS EXP (now TC) is a 3-bit field, providing 8 possible values (0-7).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
8
Why this is correct
3 bits yield 2^3 = 8 values.
- ✗
16
Why it's wrong here
16 would require 4 bits.
- ✗
64
Why it's wrong here
64 is the number of DSCP values; EXP is 3 bits.
- ✗
32
Why it's wrong here
32 would require 5 bits.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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