Which situation will cause a switch to flood traffic out all of the ports on the switch?

Question

Options

• AThe switch receives a destination MAC address of 0000.0000.0000
• BThe switch receives a destination MAC address of ffff.ffff.ffff
• CThe switch receives a source MAC address of 0000.0000.0000
• DThe switch's TCAM reaches the MAC address limit.
• EThe switch was configured in cut-through mode.

• A
  6% (4)
• B
  87% (54)
• C
  3% (2)
• D
  2% (1)
• E
  2% (1)

Explanation

A switch floods a frame out all ports (except the one it arrived on) when the destination MAC address is the broadcast address ffff.ffff.ffff. By definition, a broadcast must be delivered to every device on the local segment, so flooding is the correct behavior. Option A (all-zeros MAC) is not a valid or recognized address that triggers flooding. Option C (source MAC of all-zeros) is irrelevant - flooding is determined by the destination, not the source. Option D (TCAM limit) would cause the switch to drop new MAC entries rather than flood normally. Option E (cut-through mode) only affects when the switch begins forwarding a frame; it does not cause flooding.

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