What are two reasons to use the ip ospf database filter all out command? (Choose two.)
A.
to maintain a centralized OSPF database on a single master device
B.
to avoid flooding LSAs on low-speed links
C.
to ensure a consistent OSPF database across the network
D.
to selectively filter OSPF routes without disrupting the SPF algorithm
E.
to filter only type 7 LSAs from an OSPF area
F.
to enable OSPF to send triggered updates