all traffic to the 192.168.2.0/24 network from R3 will be routed through R1. The S0/0/1 interface on R2 is still configured as a passive interface,so OSPF routing information is not being adventised across this interface. The 129 accumulated cost results from the fact that traffic from R3 to the 192.168.2.0/24 network must pass through two serial links