350-501 Architecture Practice Question
Which Cisco platform is designed for the core/backbone of large service provider networks and offers high scalability with IOS XR?
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 CRS
The Cisco CRS (Carrier Routing System) is a high-end core router designed for the backbone of large SP networks.
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 NCS 5500
Why it's wrong here
NCS 5500 is also aggregation/edge.
- ✓
Cisco CRS
Why this is correct
CRS is the core router.
- ✗
Cisco 8000 series
Why it's wrong here
8000 series is newer but CRS is classic core.
- ✗
Cisco ASR 9000
Why it's wrong here
ASR 9000 is aggregation, not core.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 350-501 question from scratch — 971 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.