A network engineer receives a new router to use for WAN connectivity. Which of the following best describes the layer the network engineer should connect the new router to?

The correct answer is C. Leaf. In a spine-leaf architecture, endpoints (including servers, firewalls, and WAN/edge routers) connect to leaf switches. Leaf switches then uplink to spine switches; spine switches do not have endpoints connected directly to them. Therefore, a WAN router (an external/edge device)…

Submitted by thandi_sa· Mar 6, 2026Networking concepts

Question

Options

AAccess
BCore
CLeaf
DSpine

How the community answered

(40 responses)

A
3% (1)
C
95% (38)
D
3% (1)

Explanation

In a spine-leaf architecture, endpoints (including servers, firewalls, and WAN/edge routers) connect to leaf switches. Leaf switches then uplink to spine switches; spine switches do not have endpoints connected directly to them. Therefore, a WAN router (an external/edge device) should connect to the leaf layer--often specifically to a "border leaf" that handles external connectivity.

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