350-501 Automation and Assurance Practice Question
A large SP plans to deploy SR-TE tunnels across the backbone using an SDN controller for path computation. To ensure fast convergence and scalability, which automation approach should be used for tunnel creation?
⚠ Common exam trap
Cisco often tests the distinction between PCEP for dynamic path control versus RSVP-TE for signaled tunnels, and the trap here is that candidates confuse RSVP-TE's stateful nature with scalability, not realizing that SR-TE with PCEP delegation offloads computation to the controller for better scale.
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 with stateful delegation to controller
B is correct because PCEP with stateful delegation allows the SDN controller to compute and instantiate SR-TE tunnels dynamically, while the router delegates control to the controller for path updates. This approach ensures fast convergence by enabling the controller to react to network changes in real time and scales efficiently by centralizing path computation, avoiding per-router configuration overhead.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Static configuration on each router
Why it's wrong here
Static configuration is manual and lacks dynamic adaptation, leading to slower convergence.
- ✓
PCEP with stateful delegation to controller
Why this is correct
Stateful PCEP enables the controller to optimize and update SR-TE paths in real time, improving convergence.
- ✗
RSVP-TE tunnels
Why it's wrong here
RSVP-TE is not based on Segment Routing and is less scalable for large networks.
- ✗
NetFlow-based path selection
Why it's wrong here
NetFlow is for traffic analysis, not for tunnel creation or path computation.
- ✗
SNMP traps
Why it's wrong here
SNMP traps are for event notifications, not for configuring tunnels.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-501 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-501 exam.