CCNA: Cisco Certified Network Associate — Question 1034

How does MAC learning function?

Answer options

• A. restricts ports to a maximum of 10 dynamically-learned addresses
• B. increases security on the management VLAN
• C. drops received MAC addresses not listed in the address table
• D. associates the MAC address with the port on which it is received

Correct answer: D

Explanation

The correct answer, D, describes how MAC learning works by associating a MAC address with the port it arrives on, allowing for efficient data forwarding. Option A incorrectly specifies a limit on the number of addresses, which is not a characteristic of MAC learning. Option B discusses security but does not address the MAC learning process, and option C inaccurately describes a function that is not central to MAC learning operations.