单项选择题

Which CLI command is used to see the current OSPF link-state database?（）

A. show ospf database
B. show ospf neighbor
C. show protocols ospf
D. show ospf link-state

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单项选择题

If all OSPF routers on a broadcast network have the same OSPF priority, what parameter is used to determine the new BDR at the time of a DR failure?（）

A. area ID
B. router ID
C. loopback address
D. IP address of interface on broadcast network

单项选择题

What is the purpose of the OSPF link-state update packet?（）

A. describes a change to the OSPF hello timer
B. carries one or more link-state advertisements
C. establishes and maintains neighbor relationships
D. describes the contents of the entire link-state database

单项选择题

Why would you make a non-backbone area a stub or not-so-stubby area?（）

A. to aggregate routes learned from the ABR
B. to lower the cost of routes advertised by the ABR
C. to connect a non-contiguous area to the backbone
D. to decrease the size of the link-state database in that area