What action takes place when the source MAC address of a frame entering a switch appears in the MAC address table associated with a different port?

Question:
What action takes place when the source MAC address of a frame entering a switch appears in the MAC address table associated with a different port?

• The switch purges the entire MAC address table.
• The switch replaces the old entry and uses the more current port.
• The switch updates the refresh timer for the entry.
• The switch forwards the frame out of the specified port.

Exam with this question: Switching, Routing, and Wireless Essentials ( Version 7.00) - SRWE Final Exam
Exam with this question: CCNA ensa v7 Certification Practice Exam