350-501 MPLS and Segment Routing Practice Question
In MPLS-TE, what is the purpose of the Explicit Route Object (ERO) in the RSVP PATH message?
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 specify the desired path as a list of nodes or links.
ERO specifies the strict or loose hops that the TE LSP must traverse. It allows the headend to enforce a specific path through the network.
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 specify the desired path as a list of nodes or links.
Why this is correct
Correct.
- ✗
To label the path with a tunnel ID.
Why it's wrong here
Tunnel ID is in SESSION object.
- ✗
To reserve bandwidth along the path.
Why it's wrong here
Bandwidth is in SESSION_ATTRIBUTE or ADSPEC.
- ✗
To record the actual path taken by the LSP.
Why it's wrong here
Record Route Object (RRO) does that.
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