The output information of a certain router is shown in the figure, so which one of the following descriptions is correct? <R2>display ospf interface GigabitEthernet 0/0/0 verbose OSPF Process 1 with…

Question

Options

• AThe interface address of the router is 10.1.12.1
• BThe Router ID of the router is 10.0.12.2
• CThe cost value of the router interface is 1500
• DThe router interface is BDR

• A
  5% (2)
• B
  11% (4)
• C
  3% (1)
• D
  82% (31)

Explanation

Option D is correct because the output explicitly shows State: BDR, meaning this router's interface has been elected as the Backup Designated Router on the broadcast segment, and the Backup Designated Router: 10.0.12.2 field confirms that this interface (10.0.12.2) holds that role.

Why the distractors fail:

• A is wrong because the interface address is 10.0.12.2 (shown in the Interface: line), not 10.1.12.1 - that address doesn't appear anywhere in the output.
• B is wrong because the Router ID (10.0.2.2) is displayed in the header line, distinct from the interface IP (10.0.12.2) - a common trap since they look similar.
• C is wrong because the Cost: 1 is clearly stated; 1500 is the MTU value, not the cost.

Memory tip: In OSPF output, always read the header line for the Router ID and the State: field for the DR/BDR role - these are separate from the interface IP. Think "MTU ≠ Cost" to avoid the 1500 trap.

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