正解:A,D
To enable R1 and R2 to advertise routes into OSPF, the configurations must include the network command under OSPF configuration mode specifying the network to be advertised along with the appropriate wildcard mask and area ID. Additionally, the interfaces that connect R1 and R2 should be configured with the ip ospf command to include them in the OSPF process. References := The Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) course covers OSPF configuration and optimization in a Service Provider network infrastructure, which includes the use of the network and ip ospf commands for route advertisement