350-501 Networking Practice Question
In IS-IS, what is the purpose of the Partial Route Computation (PRC)?
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
✓
To recompute only the routes that are affected by a change in IP reachability
PRC recomputes only affected routes when a leaf changes, without full SPF, enabling faster convergence.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
To compute the entire SPF tree after a topology change
Why it's wrong here
That's full SPF.
- ✓
To recompute only the routes that are affected by a change in IP reachability
Why this is correct
PRC is triggered by IP prefix changes.
- ✗
To calculate the shortest path to all destinations in the L2 backbone
Why it's wrong here
PRC is not limited to L2.
- ✗
To repair IS-IS adjacency after link failure
Why it's wrong here
That's BFD or fast hello.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-501 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 350-501 exam.