350-501 Automation and Quality of Services Practice Question
In the DiffServ model, which DSCP value is used for Voice over IP (VoIP) traffic to ensure Expedited Forwarding (EF) per-hop behavior?
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 46 (EF)
EF PHB is used for low-loss, low-latency traffic such as voice. The recommended DSCP value for EF is 46 (binary 101110).
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 34 (AF41)
Why it's wrong here
AF41 (DSCP 34) is used for high-priority data, not voice.
- ✗
DSCP 26 (AF31)
Why it's wrong here
AF31 (DSCP 26) is used for medium-priority data, not voice.
- ✓
DSCP 46 (EF)
Why this is correct
DSCP 46 is the standard value for Expedited Forwarding, used for voice.
- ✗
DSCP 0 (Best Effort)
Why it's wrong here
DSCP 0 is used for best-effort traffic, not for EF.
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