A.When the router advertises its own BGP routes to BGP neighbor 12.12.12.2, it will allow advertisement of routes from 172.16.0.0 to 172.31.255.255.

B.When the router advertises its own BGP routes to BGP neighbor 12.12.12.2, it filters out all routes.

C.When the router advertises its own BGP routes to BGP neighbor 12.12.12.2, it will filter out the routes from 172.16.0.0 to 172.31.255.255.

D.When the router advertises its own BGP routes to BGP neighbor 12.12.12.2, it will be allowed to advertise routes from 10.0.0.0 to 10.255.255.255.

A.The routers in one area can understand the topology details outside their area.

B.LSA can also be reduced with the division of the area, reducing the consumption of router CPU.

C.The proliferation of flooding LSAs is limited to a single area.

D.The size of the LSDB can be reduced to reduce the memory consumption of the router.

A.PIM-SSM

B.PIM-ASM

C.PIM-SM

D.PIM-DM

A.Send an error message to the router that issued the Update.

B.Receive the route, join the BGP routing table, and participate in the BGP routing rules. It may be optimized as the best route and join the IP routing table.

C.Refused to join the BGP routing table and silently discarded.

D.Receive the route and add it to the BGP routing table. But this route will not be preferred by BGP and will not join the IP routing table.

A.Routing strategy

B.Policy routing

C.Flow classification

D.Firewall