A switch receives a frame with the destination MAC address 3C:5D:7E:9F:1A:2B. How does the switch handle the frame?

The correct answer is B. It floods the frame to all ports except the incoming port.. If the destination MAC address is not in the switch’s MAC address table, the switch floods the frame to all ports except the one on which it was received.

Submitted by dimitri_ru· Mar 5, 2026Network Fundamentals

Question

Exhibits

Options

AIt drops the frame to avoid unnecessary network congestion.
BIt floods the frame to all ports except the incoming port.
CIt switches the frame to a predetermined port based on settings.
DIt ages out the frame until the MAC address becomes known.

How the community answered

(23 responses)

A
4% (1)
B
87% (20)
D
9% (2)

Explanation

If the destination MAC address is not in the switch’s MAC address table, the switch floods the frame to all ports except the one on which it was received.

Topics

#Switch forwarding#MAC address table#Unknown unicast#Layer 2 switching

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