SD-WAN-Engineer Deployment And Configuration Practice Question
When setting up a branch site, what is the purpose of the 'Underlay' configuration?
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 configure the ISP circuit details
Underlay configuration defines the physical WAN circuit parameters (ISP, bandwidth, etc.) for the SD-WAN tunnel overlay.
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 define the routing protocol
Why it's wrong here
Routing is part of the overlay or local policy.
- ✗
To manage internal LAN switches
Why it's wrong here
Underlay is strictly WAN-facing.
- ✗
To configure DHCP
Why it's wrong here
DHCP is a separate interface setting.
- ✓
To configure the ISP circuit details
Why this is correct
This defines the physical WAN characteristics.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Palo Alto Networks exam blueprint
This SD-WAN-Engineer practice question is part of Courseiva's free Palo Alto Networks 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 SD-WAN-Engineer exam.