Which of the following statements regarding OSPF intra-area or inter-area router roles are true? (Multiple Choice)
A . An internal router is a router of which all the interfaces belong to the same area.
B . An Area Border Router (ABR) is a router connected to one or more areas, one of which is the backbone area. ABRs function as gateways for inter-area communication.
C . A backbone router is a router with at least two interfaces belonging to the backbone area.
D . An Autonomous System Boundary Router (ASBR) can be an internal router, a backbone router, or an AB
Answer: ABD