hardMultiple ChoiceObjective-mapped
200-901 Practice Question: Refer to the exhibit
Exhibit
Refer to the exhibit.
! NSO configuration snippet
services {
l3vpn vpn1 {
endpoint ce1 {
device [pe1 pe2]
interface GigabitEthernet0/0/1
ip-address 10.0.0.1/30
}
endpoint ce2 {
device pe3
interface GigabitEthernet0/0/2
ip-address 10.0.0.5/30
}
}
}Refer to the exhibit. A service engineer runs a 'check-sync' action on the NSO service 'vpn1'. The result shows 'out-of-sync' for device 'pe1'. What does this indicate?
⚠ Common exam trap
Watch out — candidates often confuse 'out-of-sync' with connectivity or hardware issues; Cisco tests whether you understand that NSO's check-sync is a configuration comparison mechanism, not a reachability or health check.
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
✓
The configuration on pe1 differs from the service model defined in NSO.
The 'check-sync' action in NSO compares the actual device configuration (retrieved via NETCONF or CLI) against the configuration that NSO's service model expects. An 'out-of-sync' result for device 'pe1' means the running configuration on pe1 does not match the configuration defined by the NSO service model for that device. This is a standard NSO feature to detect configuration drift.
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 device pe1 is unreachable via NETCONF.
Why it's wrong here
Unreachable would cause connection error, not out-of-sync.
- ✗
The service model in NSO does not have a configuration for pe1.
Why it's wrong here
It has, as per exhibit.
- ✗
The device pe1 has a hardware failure.
Why it's wrong here
Check-sync does not check hardware.
- ✓
The configuration on pe1 differs from the service model defined in NSO.
Why this is correct
Check-sync compares device config with service model.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-901 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 200-901 exam.