To enable communication between two Line of Business (LOB) applications in Oracle Cloud Infrastructure (OCI), which CIDR ranges are appropriate for VCN peering?

For VCN peering in Oracle Cloud Infrastructure (OCI), it is crucial that the CIDR ranges of the two Virtual Cloud Networks (VCNs) do not overlap. This ensures that traffic can be routed appropriately between the peered VCNs without any IP address conflicts.

The choice indicating VCN A with a CIDR of 10.0.0.0/16 and VCN B with a CIDR of 10.1.0.0/16 meets this requirement effectively. Both CIDR blocks belong to the private address space defined by RFC 1918 and do not overlap, which allows for seamless communication between the two VCNs. With 10.0.0.0/16 covering addresses from 10.0.0.0 to 10.0.255.255 and 10.1.0.0/16 covering addresses from 10.1.0.0 to 10.1.255.255, there is a clear distinction between the address ranges of both VCNs.

In contrast, the other options present CIDR ranges that either overlap or are too close together. For example, option B has both VCNs using the 10.0.2.