What two actions occur when applying dynamic port breakout on an interface?

Question

Options

• AInterface name is changed.
• B802.1x dynamic VLAN assignment applied.
• CInterface configuration removed.
• DSpeed set based on inserted transceiver type.
• EBreakout applied after reboot.

• A
  89% (25)
• B
  7% (2)
• E
  4% (1)

Explanation

When dynamic port breakout is applied, the original high-speed interface (e.g., Ethernet1/1) is split into multiple sub-interfaces, so the naming convention changes to reflect the new logical ports (e.g., Ethernet1/1/1 through Ethernet1/1/4) - confirming A. Because the original interface is effectively destroyed and replaced with new ones, any existing configuration on it is automatically wiped - confirming C.

Why the distractors are wrong:

• B is wrong because 802.1x dynamic VLAN assignment is an authentication/access-control feature, completely unrelated to physical port breakout.
• D is wrong because while the transceiver affects available speeds, the breakout configuration is administratively applied, not auto-set by the inserted optic.
• E describes static port breakout behavior, where a reboot is required; the key word "dynamic" means the breakout takes effect immediately without a reboot.

Memory tip: Think of dynamic breakout as "demolish and rebuild" - the old interface is demolished (config removed) and rebuilt with new names. If it needed a reboot, it wouldn't be "dynamic."

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