350-501 Automation and Quality of Service Practice Question
Exhibit
Refer to the exhibit.
Router# show policy-map interface GigabitEthernet0/0/0 input
GigabitEthernet0/0/0
Service-policy input: QOS-POLICY
Class-map: VOICE (match-all)
1151375 packets, 108215153 bytes
5 minute offered rate 13000 bps, drop rate 0000 bps
Match: ip dscp ef (46)
police:
cir 10000 bps, bc 1500 bytes
conformed 1151375 packets, 108215153 bytes; actions:
transmit
exceeded 0 packets, 0 bytes; actions:
drop
conformed 13000 bps, exceed 0000 bps
Class-map: VIDEO (match-all)
250000 packets, 35000000 bytes
5 minute offered rate 25000 bps, drop rate 5000 bps
Match: ip dscp af41 (34)
police:
cir 20000 bps, bc 1500 bytes
conformed 200000 packets, 28000000 bytes; actions:
transmit
exceeded 50000 packets, 7000000 bytes; actions:
drop
conformed 20000 bps, exceed 5000 bps
Class-map: class-default (match-any)
500000 packets, 60000000 bytes
5 minute offered rate 50000 bps, drop rate 0000 bps
Match: anyBased on the exhibit, which statement is true about the applied QoS policy?
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
✓
Video traffic is being dropped at a rate of 5 kbps.
The exhibit shows that the video class has a police rate of 20 kbps and an exceed rate of 5 kbps, indicating that 5 kbps of video traffic is being dropped due to the policer. Option A is false because the voice class has no drops. Option B is false because the policy does not use low-latency queuing (LLQ); it uses policing instead. Option D is false because voice traffic shows zero drops.
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 default class matches only best-effort traffic.
Why it's wrong here
The default class matches 'any', including all traffic not matched by other classes.
- ✗
The policy uses low-latency queuing for voice.
Why it's wrong here
No priority or LLQ is shown; only policing is applied.
- ✓
Video traffic is being dropped at a rate of 5 kbps.
Why this is correct
The video class shows an exceed rate of 5 kbps, confirming drops.
- ✗
Voice traffic is experiencing drops due to policer.
Why it's wrong here
Voice traffic shows zero exceeded packets, so no drops.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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