A company is planning to connect its 30 sites with a VPLS WAN backbone. A router at each site should
establish neighborships with all other routers using the OSPF routing protocol. Which three points must be
considered regarding DR and BDR when different router platforms are used? (Choose three.)
A. It is a best practice that the routers with the most powerful hardware should take the role of the DR and
BDR.
B. If the IP OSPF priority is the same for all routers, the highest loopback IP address and router ID will decide
which routers will take the DR and BDR role during the selection process.
C. To select the DR and BDR, the IP OSPF priority must be set to a higher value than the default value at the
DR and BDR during the selection process.
D. To select the DR and BDR, the IP OSPF priority must be set to a lower value than the default value at the
DR and BDR during the selection process.
E. The role for the DR and BDR will be selected when a new OSPF router comes up.
F. To force two routers to become a DR and a BDR, the IP OSPF priority can be set to zero at all other
OSPF routers.

Answer: ABF

Explanation: