Discover how frame switching works on Cisco switches. Learn about MAC address tables, destination ports, and the forwarding process for efficient network communication.
Table of Contents
Question
How does frame switching function on a switch?
A. rewrites the source and destination MAC address
B. forwards frames to a neighbor port using CDP
C. forwards known destinations to the destination port
D. is disabled by default on all interfaces and VLANs
Answer
C. forwards known destinations to the destination port
Explanation
Frame switching on a Cisco switch forwards known destinations to the destination port (Option C). When a switch receives a frame, it examines the destination MAC address and consults its MAC address table to determine the appropriate outgoing port. If the destination MAC address is known, the switch forwards the frame only to the specific port associated with that address, minimizing unnecessary traffic on other ports. This process ensures efficient communication between devices connected to the switch.
The switch does not rewrite the source and destination MAC addresses (Option A) during frame switching. It maintains the original addresses to ensure proper delivery to the intended recipient.
Cisco Discovery Protocol (CDP) is used for discovering neighboring devices but is not directly involved in the frame switching process (Option B).
Finally, frame switching is enabled by default on all switch interfaces and VLANs (Option D). It is a fundamental function of a switch and does not require manual activation.
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