350-501 Automation and Quality of Service Practice Question
An SP uses model-driven telemetry to monitor queue depths on core interfaces. They observe periodic spikes in the queue depth for EF traffic, causing increased latency. Which automation technique could dynamically adjust the QoS policy to mitigate the spikes?
⚠ Common exam trap
Cisco often tests the distinction between monitoring (telemetry) and active remediation (automation), so the trap here is that candidates see 'streaming telemetry' in Option D and think it solves the problem, but it only provides data—not the dynamic adjustment needed to mitigate the spikes.
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
✓
Use a Python script that consumes telemetry data and adjusts the EF bandwith percentage via NETCONF when queue depth exceeds a threshold.
It combines model-driven telemetry (to detect queue depth spikes in real time) with a closed-loop automation approach: a Python script consumes the telemetry data, and when the EF queue depth exceeds a threshold, it dynamically adjusts the EF bandwidth percentage via NETCONF. This directly addresses the periodic spikes by modifying the QoS policy on the fly, reducing latency without manual intervention.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use a Python script that consumes telemetry data and adjusts the EF bandwith percentage via NETCONF when queue depth exceeds a threshold.
Why this is correct
Closed-loop automation enables dynamic QoS adjustment.
- ✗
Deploy NETCONF YANG modules for VRF configuration.
Why it's wrong here
VRF YANG modules do not adjust QoS.
- ✗
Configure WRED on the EF queue.
Why it's wrong here
WRED helps with congestion avoidance but does not adapt bandwidth.
- ✗
Implement streaming telemetry to collect data every 5 seconds.
Why it's wrong here
Telemetry only collects data, does not change configuration.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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