hardMultiple Choice
350-401 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show policy-map interface GigabitEthernet0/0
GigabitEthernet0/0
Service-policy input: QOS_POLICY
Class-map: VOICE (match-any) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: ip dscp ef (46) Queueing queue limit 64 packets (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 0/0 police cir 1000000 bc 31250 be 31250 conformed 0 bytes; actions: transmit exceeded 0 bytes; actions: drop violated 0 bytes; actions: drop
Class-map: class-default (match-any) 100 packets, 12000 bytes 5 minute offered rate 8000 bps, drop rate 0 bps Match: any Queueing queue limit 64 packets (queue depth/total drops/no-buffer drops) 0/0/0 (pkts output/bytes output) 100/12000
Based on this output, what can be concluded?
⚠ Common exam trap
Cisco often tests the distinction between policing and shaping, where candidates mistakenly interpret a police statement as shaping or assume the policy direction is output when the output clearly shows 'input'.
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
✓
Voice traffic is being policed at 1 Mbps and any excess is dropped.
The output shows a police statement for the VOICE class with a CIR of 1,000,000 bps (1 Mbps) and actions to transmit conforming traffic while dropping exceeding and violating traffic. This confirms that voice traffic is being policed at 1 Mbps and any excess is dropped. The presence of policing (not shaping) and the input direction (Service-policy input) further support this conclusion.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The policy is applied in the output direction.
Why it's wrong here
The command shown on the interface is 'service-policy input', not 'service-policy output'. An input policy is applied to packets that are received on that interface before they are routed; an output policy would need the keyword 'output'. Therefore the statement is factually wrong about the policy's direction of application.
- ✓
Voice traffic is being policed at 1 Mbps and any excess is dropped.
Why this is correct
The VOICE class is configured with the 'police' command using a CIR of 1,000,000 bps (1 Mbps). Both the exceed-action and violate-action are 'drop', so any traffic above the committed information rate is immediately discarded rather than remarked or re-queued. This makes the statement that voice traffic is policed at 1 Mbps with excess dropped accurate.
- ✗
All traffic is being policed at 8 kbps.
Why it's wrong here
Only the class named VOICE contains a police statement; the class-default class has no policing command. Therefore non-voice traffic is not being policed at any rate, and the claim that all traffic is policed at 8 kbps is false. The policy applies only to the traffic matched by the VOICE class, and the CIR for that class is 1 Mbps, not 8 kbps.
- ✗
The policy is shaping traffic to 1 Mbps.
Why it's wrong here
This policy uses the 'police' command, which is a policing mechanism that drops or remarks packets that exceed the CIR. Shaping, in contrast, uses 'shape average' or similar commands and buffers excess traffic in a queue to smooth transmission. Since the configuration contains police actions and not a shaping command, the statement that the policy is shaping traffic to 1 Mbps is incorrect.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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