A.[Router-ospf-1] prefernce 100

B.[Router-ospf-1] ospf prefernce 100

C.[Router] ospf prefernce 100

D.[Router] prefernce 100

A.In order to save system resources, Level-1-2 IS only maintains the LSDB of Level-2

B.Both Level-1 and Level-2 routes can be transmitted between ISs

C.An IS that can transmit both Level-1 and Level-2 routes is called a Level-1-2 IS, and it is responsible for inter-area communication

D.Only Level-1 routes can be passed between ISs

A.PC receives RA periodically sent by router to FF02::1

B.PC host sends RS to FF02::2 to request RA from all routers on the link

C.PC receives NA periodically sent by router to FF02::1

D.PC host sends NS to FF02::2 to request RA from all routers on the link

A.PBR is a mechanism for routing based on user-defined policies

B.PBR can perform routing based on the source address of arriving packets

C.Through PBR, you can set the attributes of routes imported by routing protocols

D.PBR can route based on the length of arriving packets

A.RTD

B.RTC

C.RTB

D.RTA