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> Routing Protocols
> Designated Router (DR)
> The Role of the OSPF Designated Router (DR)
With a DR, the topology exchange process happens between the DR and every other router. As a result, all routing updates flow to and from the DR, with the DR essentially distributing the topology information to the other routers.
Odom, Wendell (2008) CCNA ICND2 Official Exam Certification Guide, Second Edition. Indianapolis: Cisco Press.