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單項選擇題

Refer to the exhibit. Based on this command output, what can we conclude about R3?（）

A. R3 is an ABR.
B. R3 is not connec ted to the backbone.
C. R3 has four neighbors.
D. R3 is the DR for area 2.

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單項選擇題

Refer to the exhibit. OSPF is running throughout the network. You want to minimize the propagation of LSAs into and out of A rea 1. Which OSPF feature would best achieve this goal? （）

A. stub
B. totally stubby
C. NSSA
D. totally NSSA

單項選擇題

The administrator wants to verify the current state of the OSPF database loading process. Which show command should the administrator use?（）

A. show ip ospf [process - id] interface
B. show ip ospf neighbor
C. show ip ospf [process - id]
D. show ip ospf [process - id area - id] database