A. Area IDB. N-selectorC. System IDD. AS numberE. ISO n……

单项选择题Three IS-IS routers on a broadcast segment have different priority values configured. Which router is elected the DIS on that broadcast segment?（）

A. the router with the lowest priority
B. the router with the highest priority
C. the router with the highest System ID
D. the router with the highest IP address

单项选择题What type of OSPF router is responsible for redistributing routes into OSPF?（）

A. ABR
B. ASBR
C. internal router
D. backbone router

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

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