CCNA: Cisco Certified Network Associate — Question 845

Which switching feature removes unused MAC addresses from the MAC address table, which allows new MAC addresses to be added?

Answer options

• A. MAC address aging
• B. MAC move
• C. MAC address auto purge
• D. dynamic MAC address learning

Correct answer: A

Explanation

The correct answer is A, MAC address aging, which automatically removes old and unused MAC addresses from the table, making space for new ones. The other options do not specifically address the removal of inactive addresses: MAC move refers to the changing of a MAC address to a different port, MAC address auto purge is not a standard term, and dynamic MAC address learning is about adding new addresses, not clearing old ones.