Once you are in the Router OSPF configuration sub-mode, configure the LAN network
172.16.1.16/28 to be included in the OSPF updates that are sent out of R1.
The OSPF network command uses a combination of network-address and wildcard-mask
similar to that which can be used by EIGRP. Unlike EIGRP, the wildcard mask in OSPF is
required.
Use an area ID of 0 for the OSPF area-id parameter. 0 will be used for the OSPF area ID in all
of the network statements in this topology.