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350-501 Architecture Practice Question

Which TWO statements about IOS XR architecture are correct? (Choose two.)

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

✓

Each routing protocol runs as an independent process in IOS XR.

IOS XR uses distributed OS with process separation, and a commit/rollback model for configuration. It does not have a monolithic kernel; each protocol is a separate process. The admin plane is separate from SDRs.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    Configuration changes in IOS XR take effect immediately without a commit.

    Why it's wrong here

    Changes are staged and committed explicitly.

  • ✗

    The admin plane in IOS XR is used for customer VPN configuration.

    Why it's wrong here

    Admin plane is for system management, not VPNs.

  • ✓

    Each routing protocol runs as an independent process in IOS XR.

    Why this is correct

    Correct. Process separation enhances stability.

  • ✗

    IOS XR runs a monolithic kernel where all protocols share the same memory space.

    Why it's wrong here

    IOS XR uses process separation, not monolithic.

  • ✓

    IOS XR supports a commit/rollback configuration model.

    Why this is correct

    Correct. Changes can be committed or rolled back.

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