Two routers are directly connected via Gig0/0 over a 1 Gbps link. Which 'ip ospf network' setting on both interfaces forms an adjacency without DR/BDR election?

The ip ospf network point-to-point command configures the OSPF interface to operate in point-to-point mode. In this mode, OSPF assumes there are only two routers on the link, eliminating the need for a Designated Router (DR) and Backup Designated Router (BDR) election. This simplifies adjacency formation and reduces overhead. non-broadcast is used for non-broadcast multi-access (NBMA) networks where neighbors must be manually configured, and it still involves DR/BDR election. point-to-multipoint is also for NBMA networks, treating each neighbor as a point-to-point link but still requiring DR/BDR election for the overall network type. broadcast is the default for Ethernet interfaces and always triggers DR/BDR election.