I am currently studying OSPF and would be very grateful if anyone could clear up some confusion for me.
I have read that a Designated Router is selected per ethernet segment (i.e per subnet). Now in an ethernet environment say with 4 routers in an area there will likely be a minimum of 4 ethernet segments linking them. In this situation surely that means there are 4 DRs within a single area but there is only supposed to be one DR in an area to save LSA overhead. Must all routers within an area be connected by a single segment? I've read several expalnations and it's still no clearer to me so would really appreciate someone clearing this up!