default route -->            eBGP           eBGP            <-- default routeInternet---------FW1-------------------R2---------R1---------R5-------------------FW2-----------Internet           202.100.0.1        ...

Is it necessary to specify DR and BDR manually from the perspective of best OSPF design practice?

On Router-A and Router-B，configure area 0 and area 1 as follows： Router-A：    area 0：10.5.5.5    area 1：10.4.4.4Router-B：    area 0：10.5.5.6    area 1：10.4.4.5   On Router-A, redistribute an external route into OSPF, so Router-A is an ASBR. Question:...