Which of these statements best describes how neighbor adjacencies are formed in a multi-access
OSPF network?

A.
The router with the highest priority will become the DR

B.
Only those routers with the Cisco default priority of 0 are eligible to become the DR or BDR.

C.
The router with the highest loop-back address will become the DR if two or more routers have
the same priority.

D.
The router with the lowest Router ID will become the DR and the router with the next lowest
Router ID will become the BDR.

E.
Election of the DR and BDR begins only after a router that wants to become either the DR or

BDR enters the ExStart state.

Explanation:
The router with the highest priority is elected the DR on a multiaccess network. A router with a
priority of 0 is ineligible to become a DR or BDR. In the event of a tie in priority, the router with the
highest router ID is elected the DR. If no router ID has been manually configured on a router, the
router uses its numerically highest loopback address as its router ID. If no loopback interfaces
have been configured, the router uses its numerically highest IP address of any physical interface.
Cisco use a default priority of 1 (higher is better). On a tie, the highest router id wins. If there is still
a tie, the highest loopback address wins. Still a tie, the highest active interface
IP wins.