The answer is that HTTP traffic is policed to an average rate of 2 Mbps, with conforming packets transmitted and exceeding packets dropped. This is correct because the police command with conform-action transmit and exceed-action drop enforces a traffic contract: packets that stay within the committed information rate of 2,000,000 bits per second, using a normal burst of 1500 bytes and an excess burst of 3000 bytes, are allowed through, while any traffic that exceeds this rate is immediately discarded. On the ENCOR 350-401 exam, this scenario tests your understanding of the police command’s three-part token bucket model—rate, normal burst, and excess burst—and how the conform-action and exceed-action keywords dictate packet treatment. A common trap is confusing policing with shaping; remember that policing drops excess traffic, whereas shaping queues it. To recall the effect, think of the phrase “police with conform-action transmit, exceed-action drop” as a strict bouncer: if you’re within the limit, you enter; if you’re over, you’re out.
350-401 QoS Practice Question
This 350-401 practice question tests your understanding of qos. 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.
Consider the following configuration:
class-map match-all HTTP
match protocol http
policy-map QOS
class HTTP
police 2000000 1500 3000 conform-action transmit exceed-action drop
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
HTTP traffic is policed to an average rate of 2 Mbps; packets that exceed the rate are dropped, while conforming packets are transmitted.
The police command limits HTTP traffic to an average rate of 2 Mbps with a normal burst of 1500 bytes and an excess burst of 3000 bytes. Traffic within the rate is transmitted; traffic exceeding the rate is dropped.
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.
✓
HTTP traffic is policed to an average rate of 2 Mbps; packets that exceed the rate are dropped, while conforming packets are transmitted.
Why this is correct
Correct. Policing with 'conform-action transmit' and 'exceed-action drop' drops excess traffic.
Related concept
Read the scenario before looking for a memorised answer.
✗
HTTP traffic is shaped to an average rate of 2 Mbps; excess packets are buffered.
Why it's wrong here
Incorrect. Policing drops or remarks, it does not buffer.
✗
The police command will mark HTTP packets with a DSCP value of 0 if they exceed the rate.
Why it's wrong here
Incorrect. The exceed-action is 'drop', not 'set-dscp-transmit'.
✗
The configuration is invalid because 'police' cannot be used in a 'service-policy input' direction.
Why it's wrong here
Incorrect. Policing can be applied in either direction.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 350-401 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 350-401 question in full detail.
Identify which 350-401 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
QoS — This question tests QoS — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: HTTP traffic is policed to an average rate of 2 Mbps; packets that exceed the rate are dropped, while conforming packets are transmitted. — The police command limits HTTP traffic to an average rate of 2 Mbps with a normal burst of 1500 bytes and an excess burst of 3000 bytes. Traffic within the rate is transmitted; traffic exceeding the rate is dropped.
What should I do if I get this 350-401 question wrong?
Identify which 350-401 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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