The four routers R1, R2, R3 and R4 enable OSPF to establish neighbor relationships. The topology and related parameters are shown in the figure. R1: ROUTER-ID: 1.1.1.1, G0/0/0 ip address…

The four routers R1, R2, R3 and R4 enable OSPF to establish neighbor relationships. The topology and related parameters are shown in the figure. R1: ROUTER-ID: 1.1.1.1, G0/0/0 ip address: 12.12.12.1, DR-priority: 255 R2: ROUTER-ID: 2.2.2.2, G0/0/0 ip address: 12.12.12.2, DR-priority: 254 R3: ROUTER-ID: 3.3.3.3, G0/0/0 ip address: 12.12.12.3, DR-priority: 0 R4: ROUTER-ID: 4.4.4.4, G0/0/0 ip address: 12.12.12.4, DR-priority: 0 At this time, R2 is disconnected for some reason, so the Hello report transmitted between R1, R3 and R4 In the text, which of the following is the value of the BDR field?