CCNA: Cisco Certified Network Associate — Question 1343

How are the switches in a spine-and-leaf topology interconnected?

Answer options

• A. Each leaf switch is connected to one of the spine switches
• B. Each leaf switch is connected to each spine switch.
• C. Each leaf switch is connected to two spine switches, making a loop.
• D. Each leaf switch is connected to a central leaf switch, then uplinked to a core spine switch.

Correct answer: B

Explanation

The correct answer is B because in a spine-and-leaf topology, each leaf switch connects to every spine switch to ensure optimal bandwidth and redundancy. Option A is incorrect as it suggests a single connection to one spine switch, which does not provide the necessary resilience. Option C is wrong because it describes a loop, which is not a design feature of spine-and-leaf. Option D misrepresents the design by implying a central leaf switch, which contradicts the direct connections in this topology.