CCNA: Cisco Certified Network Associate — Question 578

What is a function of MAC address learning?

Answer options

• A. It is disabled by default on all interfaces connected to trunks.
• B. It increases security on the management VLAN.
• C. It is enabled by default on all VLANs and interfaces.
• D. It increases the potential for MAC address flooding.

Correct answer: C

Explanation

The correct answer is C because MAC address learning is typically enabled by default on all VLANs and interfaces to facilitate efficient data forwarding. Option A is incorrect as MAC address learning is generally enabled on trunk interfaces, not disabled. Option B is not accurate since MAC address learning does not specifically enhance management VLAN security, and option D is misleading as MAC address learning does not inherently increase flooding potential.