350-501 Architecture Practice Question
An SP is designing a core network using Cisco CRS routers running IOS XR. They require process separation to ensure that a failure in the BGP process does not affect OSPF operations. Which IOS XR architectural feature provides this capability?
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
✓
Process separation
IOS XR uses a distributed OS where each protocol runs as a separate process (process separation). This prevents a crash in one protocol process from impacting others, enhancing stability.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Non-Stop Forwarding (NSF)
Why it's wrong here
NSF allows forwarding during route processor switchover, not process separation.
- ✓
Process separation
Why this is correct
Correct. Each protocol runs as an independent process, ensuring fault isolation.
- ✗
Graceful Restart
Why it's wrong here
Graceful Restart helps BGP peers maintain routes during restart, not process separation.
- ✗
Secure Domain Router (SDR)
Why it's wrong here
SDR provides virtualization but not process-level isolation between protocols.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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