Question 830 of 2,015

QoS →hardMultiple ChoiceObjective-mapped

CCNP QoS Practice Question

This 350-401 practice question tests your understanding of qos. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.

A network engineer runs the following command on Router R6:

R6# show policy-map interface GigabitEthernet0/1

GigabitEthernet0/1

Service-policy output: QOS_POLICY

Class-map: VOICE (match-any) 500 packets, 50000 bytes 5 minute offered rate 50000 bps, drop rate 0 bps Match: ip dscp ef (46) Queueing strict priority queue limit 64 packets (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 500/50000 police cir 1000000 bc 15625 be 15625 conformed 500 packets, 50000 bytes; actions: transmit exceeded 0 packets, 0 bytes; actions: drop violated 0 packets, 0 bytes; actions: drop

Class-map: DATA (match-any) 1000 packets, 100000 bytes 5 minute offered rate 100000 bps, drop rate 0 bps Match: ip dscp af31 (26) Queueing (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 1000/100000 bandwidth remaining percent 50

Class-map: class-default (match-any) 2000 packets, 200000 bytes 5 minute offered rate 200000 bps, drop rate 0 bps Match: any Queueing (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 2000/200000 bandwidth remaining percent 50

Based on this output, what can be concluded?

Question 1hardmultiple choice

Study the full QoS explanation →

A
Voice traffic is being dropped because it exceeds the police rate.
Why wrong: The voice offered rate is 50 kbps, below the 1 Mbps police rate, so no drops.
B
Data traffic is being guaranteed 50% of the remaining bandwidth.
The DATA class has 'bandwidth remaining percent 50', meaning it gets 50% of the bandwidth left after priority queuing.
C
All traffic is being shaped to a CIR of 1 Mbps.
Why wrong: There is no shape command; only police on voice and bandwidth remaining on others.
D
The policy-map is applied to input traffic.
Why wrong: The output says 'Service-policy output'.

Full breakdown with real-world context →

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

✓

Data traffic is being guaranteed 50% of the remaining bandwidth.

The VOICE class uses strict priority queuing and is policing at 1 Mbps. The offered rate for voice is 50 kbps, well below the police rate, so all voice packets are conforming and transmitted. The DATA and class-default classes share remaining bandwidth equally (50% each). The total offered rate is 350 kbps, and since the interface bandwidth is likely higher, no drops occur.

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.

✗
Voice traffic is being dropped because it exceeds the police rate.
Why it's wrong here
The voice offered rate is 50 kbps, below the 1 Mbps police rate, so no drops.
✓
Data traffic is being guaranteed 50% of the remaining bandwidth.
Why this is correct
The DATA class has 'bandwidth remaining percent 50', meaning it gets 50% of the bandwidth left after priority queuing.
Related concept
Read the scenario before looking for a memorised answer.
✗
All traffic is being shaped to a CIR of 1 Mbps.
Why it's wrong here
There is no shape command; only police on voice and bandwidth remaining on others.
✗
The policy-map is applied to input traffic.
Why it's wrong here
The output says 'Service-policy output'.

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.

Trap categories for this question

Command / output trap
There is no shape command; only police on voice and bandwidth remaining on others.

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.

What to study next

Got this wrong? Here's your next step.

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.

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FAQ

Questions learners often ask

What does this 350-401 question test?

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: Data traffic is being guaranteed 50% of the remaining bandwidth. — The VOICE class uses strict priority queuing and is policing at 1 Mbps. The offered rate for voice is 50 kbps, well below the police rate, so all voice packets are conforming and transmitted. The DATA and class-default classes share remaining bandwidth equally (50% each). The total offered rate is 350 kbps, and since the interface bandwidth is likely higher, no drops occur.

What should I do if I get this 350-401 question wrong?

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 18, 2026

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