A.Filtering In the link state routing protocol, the routing table is generated through the LSDB, so Filter- Policy essentially filters the LSA in the LSDB

B.In the distance vector protocol, because routing information is passed between devices, Filter-Policy can directly

C.Filter-Policy can be used on both OSPFv2 and OSPFv3

D.In the distance vector protocol, if you want to filter out the route from the upstream device to the downstream device, you need to configure filter-policy export on the downstream device.

A.When the matching order of the ACL is the config mode, it will be matched in descending order of the serial number

B.After the packet matches the ACL, only two results will be generated: "match" and "mismatch"

C.When the packet matches the ACL, if the packet hits the rule and the ACL action is "permit", the matching result is "match". When the packet hits the rule and the ACL action is "deny", it returns The result is "does not match"

D.If the ACL exists but there is no rule inside the ACL, the result will be directly returned as "does not match"

A.TRUE

B.FALSE

A.Alternative port, Backup port

B.Backup port, Root port

C.backup port, Alternative port

D.Root port, Designate port

A.Local-Preference

B.Origin

C.AS_PATH

D.MED