Refer to the exhibit. All routers in this network are configured to place all interfaces in OSPF area 5. R3 is the designated router on the 10.1.5.0/24 network. If you examine the OSPF database on R4,

R3, as the DR on 10.1.5.0/24, generates a Network LSA describing that transit network and listing every router that has formed a full adjacency with it on that segment. The DR includes itself in the attached-router list alongside R2 and R1, which is how the Type 2 LSA correctly represents all participants on the multi-access network.

This option omits R3 itself; the DR is always included as an attached router in the Type 2 LSA it originates, since the DR is also connected to the segment it is describing.

A Type 2 LSA covers exactly one multi-access transit segment; subnets such as 10.1.1.0/31 are point-to-point links described in separate Router (Type 1) LSAs and are never bundled into a Network LSA.

R3 is the elected DR on 10.1.5.0/24, and OSPF mandates that the DR generate a Network LSA for every multi-access segment on which it holds that role.