How do you enable interface fe-0/0/0 under the [edit protocols isis] level to form both a Level 1 and Level 2 adjacency?（）

单项选择题How often are IS-IS Hello packets transmitted?（）

A. 3 seconds for DIS; 9 seconds for non-DIS
B. 9 seconds for DIS; 3 seconds for non-DIS
C. 10 seconds for DIS; 3 seconds for non-DIS
D. 10 seconds for all routers

多项选择题What are the three components of the ISO NET address?（）

A. Area ID
B. N-selector
C. System ID
D. AS number
E. ISO number
F. MAC address

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