350-501 Architecture Practice Question
In IOS XR architecture, what is the purpose of Secure Domain Router (SDR)?
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 enable process separation and fault isolation
SDR logically partitions a physical router into multiple independent routers, each with its own control plane and resources.
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 encrypt control plane traffic
Why it's wrong here
Encryption is not SDR's purpose.
- ✓
To enable process separation and fault isolation
Why this is correct
SDR provides fault isolation between virtual routers.
- ✗
To provide a secure management plane
Why it's wrong here
Management plane is separate; SDR is about logical partitioning.
- ✗
To aggregate multiple physical routers
Why it's wrong here
SDR is within a single physical router.
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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.