Which of the following is a characteristic of the SD-Access underlay?

It maintains the EID-to-RLOC mapping

It uses VXLAN to encapsulate user traffic

It provides IP connectivity between fabric nodes

What is the difference between the underlay and overlay in SD-Access?

The underlay carries user traffic, while the overlay carries control traffic

The underlay uses VXLAN, while the overlay uses LISP

The underlay is managed by DNA Center, while the overlay is not

The underlay is the physical network, while the overlay is the logical network built on top

A network architect is presenting the SD-Access solution to management. Management asks: 'What are the main components that make up the SD-Access architecture?' Which answer correctly lists the three planes of SD-Access?

Control plane, data plane, and policy plane

Underlay, overlay, and management plane

A network engineer is explaining SD-Access to a junior colleague. The junior asks: 'If the underlay is already a routed network, why do we need an overlay?' Which response best describes the purpose of the overlay?

The overlay increases the bandwidth of the physical links.

The overlay provides a logical topology that decouples the user VLANs and IP addressing from the physical underlay, enabling flexible endpoint placement and mobility.

The overlay is required to connect to the internet.

The overlay replaces the need for routing protocols in the underlay.

In SD-Access, what does the VXLAN Network Identifier (VNI) represent?

The physical interface of the fabric edge

The virtual network segment or overlay

The routing locator of the underlay

CiscoCertified Network Professional Enterprise

Domain 1Objective 3

1.3 Explain the Working Principles of the Cisco SD-Access Solution 350-401 Practice Questions (Page 1)

Part of the 1.0 Architecture domain, which accounts for 15% of the 350-401 exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~8–12 in this domain), expect 2–3 from this objective — we provide 42 practice questions to prepare you well beyond it. (estimate)

42questions here

9free pages

10concepts

15%of the exam

Questions 1–5

1foundation · easy
Which of the following is a characteristic of the SD-Access underlay?
Select an answer first
2foundation · easy
What is the difference between the underlay and overlay in SD-Access?
Select an answer first
3application · medium
A network architect is presenting the SD-Access solution to management. Management asks: 'What are the main components that make up the SD-Access architecture?' Which answer correctly lists the three planes of SD-Access?
Select an answer first
4application · medium
A network engineer is explaining SD-Access to a junior colleague. The junior asks: 'If the underlay is already a routed network, why do we need an overlay?' Which response best describes the purpose of the overlay?
Select an answer first
5foundation · easy
In SD-Access, what does the VXLAN Network Identifier (VNI) represent?
Select an answer first

Finished these 5 questions?

Review the revealed explanations, or continue through the curriculum.

Next 5 questions →Back to 350-401

Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by Cisco. “350-401” is a trademark of its owner, used for identification only.