When designing and implementing OSPF in multiple areas; what should be taken in
consideration? (Select two)
A.
Each area must connect to area 0.
B.
Each area must have a unique AS number.
C.
Remote areas must be configured as stub or NSSA areas.
D.
Traffic between two areas must travel across the backbone area.
D is only correct for all areas being directly attached to the backbone area. Using virtual links there is no need for traffic to cross the backbone in all cases.