A cloud administrator is setting up a disaster recovery plan for an organization's cloud infrastructure. The plan involves a failback process which requires minimal changes to the network configuration to revert services to the primary site after a disaster has been managed. Which of the following network configurations would best support this requirement?
Use of static IP addresses across the cloud infrastructure
A single network interface controller (NIC) dedicated for DR at the primary site
Different subnet schemes at the primary and DR sites for easy identification
Identical network configurations at both the primary and disaster recovery (DR) sites