350-501 Automation and Quality of Services Practice Question
In the DiffServ model, which field is used in the IP header to mark packets for QoS treatment?
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
The DiffServ model uses the 6-bit DSCP field in the IP header to classify packets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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IP Precedence
Why it's wrong here
IP Precedence is the older 3-bit field; DSCP is 6-bit.
- ✓
DSCP
Why this is correct
DSCP is the standard marking field in DiffServ.
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802.1p
Why it's wrong here
802.1p is used in Ethernet frames, not IP.
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MPLS EXP
Why it's wrong here
MPLS EXP is used in MPLS networks, not IP.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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