350-501 Automation and Quality of Services Practice Question
An SP is implementing traffic shaping on an MPLS PE-CE link. Which TWO statements are true about shaping compared to policing? (Select 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
✓
Policing can re-mark packets to a lower DSCP, shaping cannot.
Shaping buffers excess traffic to smooth bursts, while policing drops or re-marks excess packets. Shaping introduces delay due to buffering; policing can cause TCP retransmissions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Policing typically introduces more delay than shaping.
Why it's wrong here
Shaping introduces delay due to buffering; policing drops instantly.
- ✗
Shaping is applied on ingress, policing on egress.
Why it's wrong here
Both can be applied on ingress or egress; common placement differs.
- ✗
Both shaping and policing always result in packet loss.
Why it's wrong here
Shaping does not drop unless buffer overflows.
- ✓
Policing can re-mark packets to a lower DSCP, shaping cannot.
Why this is correct
Policing can re-mark, shaping only buffers.
- ✓
Shaping buffers excess traffic, whereas policing drops or re-marks.
Why this is correct
Correct: shaping buffers, policing drops/re-marks.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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