350-501 Architecture Practice Question
In an IOS XR system, CPU and memory resources are allocated per line card. What is the primary reason for this design?
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 ensure that a failure on one card does not impact others
Distributed architecture with per-card allocation improves scalability and fault isolation. It does not directly reduce cost or simplify management; instead, it enhances performance and resilience.
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 reduce hardware cost by sharing resources
Why it's wrong here
Per-card allocation may increase cost due to replication.
- ✗
To simplify software licensing
Why it's wrong here
Licensing is separate.
- ✗
To centralize management in the route processor
Why it's wrong here
Resources are distributed, not centralized.
- ✓
To ensure that a failure on one card does not impact others
Why this is correct
Independent resources provide fault isolation.
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