The correct answer is that the policy polices all traffic to a maximum of 256 kbps and drops excess traffic. This is determined by interpreting the NETCONF XML response, which reveals a police action configured under the QoS policy 'POLICE-CUSTOMER' with a committed information rate (CIR) of 256000 bps—equivalent to 256 kbps—alongside a conform-action of 'transmit' and an exceed-action of 'drop'. This configuration implements a standard single-rate policer, as defined in RFC 2697, where traffic conforming to the CIR is forwarded, while any traffic exceeding that rate is immediately dropped. On the Cisco SPCOR 350-501 exam, this question tests your ability to read NETCONF-structured data and map XML elements to real QoS behavior, a common scenario in automation-focused service provider environments. A frequent trap is confusing police with shape; remember that police drops excess, while shape buffers it. Memory tip: "Police drops, shape delays—CIR is the line, exceed is the drop."
350-501 Automation and Quality of Service Practice Question
This 350-501 practice question tests your understanding of automation and quality of service. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Refer to the exhibit. A network automation engineer uses NETCONF to retrieve the QoS policy 'POLICE-CUSTOMER'. Based on the response, what is the effect of this policy?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It polices all traffic to a maximum of 256 kbps and drops excess.
The NETCONF response shows a 'police' configuration under the QoS policy 'POLICE-CUSTOMER' with a committed information rate (CIR) of 256000 bps (256 kbps) and a conform-action of 'transmit' with an exceed-action of 'drop'. This is a standard policing action that meters traffic to the specified rate and drops any packets that exceed it, as defined in RFC 2697 (Single Rate Three Color Marker). Option A correctly identifies this behavior.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
It polices all traffic to a maximum of 256 kbps and drops excess.
Why this is correct
Correct: Policer with exceed-action drop.
Related concept
Read the scenario before looking for a memorised answer.
✗
It sets DSCP CS4 on traffic exceeding 256 kbps.
Why it's wrong here
No marking action is configured.
✗
It guarantees a priority queue for traffic up to 256 kbps.
Why it's wrong here
No priority queue; it's a policer.
✗
It shapes traffic to an average rate of 256 kbps.
Why it's wrong here
Shaping queues excess; this policy drops, so it's policing, not shaping.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between policing (drops/marks excess) and shaping (buffers excess), and candidates mistakenly associate any rate-limiting action with shaping or marking without checking the specific action keywords in the configuration.
Detailed technical explanation
How to think about this question
Policing uses a token bucket algorithm where tokens are added at the CIR rate (256 kbps) and packets are transmitted if tokens are available; when the bucket is empty, excess packets are dropped (or marked) immediately. This contrasts with shaping, which queues excess packets and releases them later, introducing delay but avoiding drops. In real-world scenarios, policing is often applied at provider edges to enforce subscriber contracts, while shaping is used on customer premises to avoid tail drops.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 350-501 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Automation and Quality of Service — This question tests Automation and Quality of Service — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: It polices all traffic to a maximum of 256 kbps and drops excess. — The NETCONF response shows a 'police' configuration under the QoS policy 'POLICE-CUSTOMER' with a committed information rate (CIR) of 256000 bps (256 kbps) and a conform-action of 'transmit' with an exceed-action of 'drop'. This is a standard policing action that meters traffic to the specified rate and drops any packets that exceed it, as defined in RFC 2697 (Single Rate Three Color Marker). Option A correctly identifies this behavior.
What should I do if I get this 350-501 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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