In an examination of two OSPF routers that fail to exchange information, it is determined that they have not become OSPF neighbors. Which two configuration values must match for the OSPF routers to become neighbors?

neighbor ID and router ID
dead time and hello time
OSPF area and neighbor ID
OSPF area and interface priority

ccna 2 final Exam Question And Answers 

In an examination of two OSPF routers that fail to exchange information, it is determined that they have not become OSPF neighbors. Which two configuration values must match for the OSPF routers to become neighbors?