Implementing Cisco IP Switched Networks (CCNP SWITCH, legacy) — Question 143

Which statement about the MAC address sticky entries in the switch when the copy run start command is entered is true?

Answer options

• A. A sticky MAC address is retained when the switch reboots.
• B. A sticky MAC address can be a unicast or multicast address.
• C. A sticky MAC address is lost when the switch reboots.
• D. A sticky MAC address ages out of the MAC address table after 600 seconds.

Correct answer: A

Explanation

The correct answer is A because sticky MAC addresses are designed to persist through a switch reboot, allowing the learned addresses to remain in the configuration. Option B is incorrect since sticky MAC addresses are specifically unicast addresses. Option C is wrong as it contradicts the nature of sticky MAC addresses, and D is inaccurate because sticky MAC addresses do not age out like dynamic entries.