350-501 Architecture Practice Question
A service provider is deploying a new MPLS core network and needs a router platform that supports high-scale MPLS forwarding and offers a modular operating system. Which Cisco platform is best suited for this role?
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 is a carrier-grade router designed for the core/backbone with high MPLS scalability and IOS XR modularity. ASR 9000 is more for aggregation, NCS for edge/aggregation.
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 used at the aggregation layer.
- ✓
Cisco CRS
Why this is correct
The CRS is a core router supporting high-scale MPLS and IOS XR.
- ✗
Cisco 8000 series
Why it's wrong here
Cisco 8000 series are newer but more for edge/peering.
- ✗
Cisco NCS 5500
Why it's wrong here
NCS 5500 is designed for high-density 100GE at the edge/aggregation.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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