CCNA: Cisco Certified Network Associate — Question 329

How does the dynamically-learned MAC address feature function?

Answer options

• A. The CAM table is empty until ingress traffic arrives at each port
• B. Switches dynamically learn MAC addresses of each connecting CAM table.
• C. The ports are restricted and learn up to a maximum of 10 dynamically-learned addresses
• D. It requires a minimum number of secure MAC addresses to be filled dynamically

Correct answer: A

Explanation

The correct answer, A, is accurate because the Content Addressable Memory (CAM) table does not contain any entries until traffic is received, prompting the switch to learn MAC addresses. Options B and C incorrectly suggest that the switches already have some MAC addresses or that there are restrictions on the number learned, while option D incorrectly implies a prerequisite of secure MAC addresses for the dynamic learning process.