350-501 MPLS and Segment Routing Practice Question
In SR-MPLS traffic engineering, which three components are essential for configuring an SR Policy on a headend router? (Choose three.)
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
✓
Headend router
In SR-MPLS traffic engineering, an SR Policy on a headend router is defined by three essential components: the headend router itself (the router that originates the policy), the endpoint (destination prefix), and a color value that distinguishes multiple policies to the same endpoint. Bandwidth reservation (A) is optional and not part of the basic policy identifier. Explicit path with ERO (B) is a way to specify the path but is not a required component of the policy definition; segment lists are used instead. Therefore, the correct choices are C (headend), D (endpoint), and E (color).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Bandwidth reservation value
Why it's wrong here
Bandwidth reservation is not a component of SR Policy.
- ✗
Explicit path with ERO
Why it's wrong here
ERO is for RSVP-TE, not SR Policy.
- ✓
Headend router
Why this is correct
Correct: The headend is the source of the policy.
- ✓
Endpoint (destination) prefix
Why this is correct
Correct: The endpoint is the destination.
- ✓
Color (used to steer traffic with a specific color)
Why this is correct
Correct: Color is mandatory to differentiate policies.
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