350-501 Automation and Quality of Services Practice Question
An SP is deploying SR-TE policies using a central controller. The controller needs to compute paths based on bandwidth and latency constraints. Which protocol is used between the controller and the routers to signal the SR-TE policies?
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
✓
PCEP
PCEP (Path Computation Element Protocol) is used for communication between a PCE (controller) and PCC (router) to compute and instantiate SR-TE policies.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
OSPF
Why it's wrong here
OSPF is an IGP, not for TE policy signaling.
- ✗
BGP-LS
Why it's wrong here
BGP-LS distributes link-state information, but does not signal policies.
- ✗
NETCONF
Why it's wrong here
NETCONF can be used for configuration, but not for dynamic path computation.
- ✓
PCEP
Why this is correct
PCEP is the standard protocol for PCE-PCC communication for TE paths.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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