350-501 Automation and Quality of Services Practice Question
Which two statements correctly describe the use of DSCP values in the DiffServ model? (Choose two.)
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
✓
DSCP is a 6-bit field allowing 64 distinct values.
DSCP is a 6-bit field with 64 possible values. Per-hop behaviors (PHBs) like EF and AF are defined by DSCP values.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
DSCP values are mapped to MPLS EXP bits at the egress PE.
Why it's wrong here
Mapping occurs at ingress PE.
- ✓
DSCP is a 6-bit field allowing 64 distinct values.
Why this is correct
Correct: 6 bits = 64 values.
- ✓
DSCP value 46 is used for Expedited Forwarding (EF).
Why this is correct
Correct: DSCP 46 = EF.
- ✗
DSCP values are used only for voice traffic.
Why it's wrong here
DSCP is used for all traffic classes.
- ✗
DSCP value 0 indicates low latency traffic.
Why it's wrong here
DSCP 0 is best effort.
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