CCNA: Cisco Certified Network Associate — Question 1056

How does frame switching function on a switch?

Answer options

• A. floods unknown destinations to all ports except the receiving port
• B. modifies frames that contain a known source VLAN
• C. rewrites the source and destination MAC address
• D. buffers and forwards frames with less than 5 CRCs

Correct answer: A

Explanation

The correct answer is A because frame switching involves sending packets to all ports except the one from which they were received when the destination MAC address is not known. Options B, C, and D do not accurately describe the process of frame switching as they relate to specific conditions or modifications that do not represent the general function of a switch.