mediumMultiple ChoiceObjective-mapped
CCNP Practice Question: Consider the following partial configuration for…
Consider the following partial configuration for QoS on a Cisco IOS-XE router:
class-map match-all VOICE match ip dscp ef ! policy-map QOS_POLICY
class VOICE
priority 1000
class class-default
fair-queue !
interface GigabitEthernet0/0
service-policy output QOS_POLICY
What is the effect of the 'priority 1000' command under class VOICE?
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 placed in a strict priority queue with a bandwidth limit of 1000 kbps.
The 'priority' command under the class VOICE in the policy-map QOS_POLICY enables strict priority queuing (low-latency queue) for voice traffic matching DSCP EF. The 'priority 1000' sets a bandwidth limit of 1000 kbps for this queue, meaning voice traffic can use up to 1000 kbps in the strict priority queue; if it exceeds this rate, excess traffic is dropped (or reclassified, depending on configuration). This ensures voice traffic is serviced before other traffic but is limited to 1000 kbps.
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 placed in a strict priority queue with a bandwidth limit of 1000 kbps.
Why this is correct
The priority command creates a low-latency queue with a rate limit.
- ✗
Voice traffic is given a minimum bandwidth guarantee of 1000 kbps but no priority.
Why it's wrong here
The priority command provides strict priority, not just a bandwidth guarantee.
- ✗
Voice traffic is dropped if it exceeds 1000 kbps.
Why it's wrong here
Excess traffic may be dropped or reclassified, but the primary effect is priority queuing.
- ✗
Voice traffic is shaped to 1000 kbps.
Why it's wrong here
Shaping is done with the 'shape' command, not 'priority'.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-401 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-401 exam.