350-501 Architecture Practice Question
Which Cisco router platform is designed for the core/backbone of a service provider network, supporting high-density 100GE interfaces and massive scale for MPLS and Segment Routing?
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 core router platform with high-density interfaces and large scale for MPLS and Segment Routing.
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 it's wrong here
ASR 9000 is typically an aggregation or edge router.
- ✗
Cisco ISR 4000
Why it's wrong here
ISR 4000 is a branch router.
- ✓
Cisco CRS
Why this is correct
CRS is designed for core/backbone roles.
- ✗
Cisco NCS 5500
Why it's wrong here
NCS 5500 is a modular aggregation router.
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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.