Area 2 is attached only to area 1, and area 1 connects to backbone area 0. Will area 0 have full reachability to area 2 networks?

OSPF requires all non-backbone areas to connect directly to the backbone area (area 0). In this scenario, area 2 is connected only to area 1, and area 1 is connected to area 0. This creates a discontiguous backbone, meaning area 2 is not directly connected to area 0. To resolve this, a virtual link must be configured between an ABR in area 1 (connected to area 2) and an ABR in area 0 (also in area 1). This virtual link logically extends area 0 through area 1, allowing area 2 to have full reachability to area 0 networks. Redistributing routes is not the standard OSPF solution for discontiguous areas. Configuring area 2 as a stub area would restrict its ability to receive external routes, not solve the connectivity issue to area 0.