350-501 Architecture Practice Question
Which Cisco SP router platform uses IOS XR and is commonly deployed at the aggregation layer, supporting both L2 and L3 services?
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
✓
Cisco ASR 9000
Cisco ASR 9000 is an aggregation router running IOS XR, suitable for L2/L3 services.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Cisco ASR 9000
Why this is correct
ASR 9000 is a popular aggregation router with IOS XR.
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Cisco CRS
Why it's wrong here
CRS is a core router.
- ✗
Cisco ASR 1000
Why it's wrong here
ASR 1000 runs IOS XE, not typically used for high-end aggregation.
- ✗
Cisco NCS 540
Why it's wrong here
NCS 540 is a smaller edge router, but ASR 9000 is more common for aggregation.
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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.