Refer to the exhibit. A customer is planning to onboard three new VPN partner connections in the data center. The new subnets must not overlap with the existing data center network, and the subnet…

The dedicated block 10.1.8.0/21 ranges from 10.1.8.0 to 10.1.15.255. A /25 subnet (128 hosts) is a common choice for partner connections if it meets their host count requirements. Assigning Partner-A to 10.1.11.0/25 (from 10.1.11.0 to 10.1.11.127) is a valid, non-overlapping subnet within the allocated /21 block, and it adheres to the 'not bigger than necessary' requirement if 128 hosts are sufficient.

10.1.12.0/25 is a valid subnet within the 10.1.8.0/21 range and could be assigned to a partner, but if 10.1.11.0/25 is also a valid choice and the question expects one specific answer, this is simply a different valid assignment.

This option is identical to option A, meaning it is also a correct choice, which indicates potential redundancy in the provided options for a single-correct-answer question.

10.1.11.0/24 provides 256 addresses, which might be 'bigger than necessary' if the partners only require up to 128 hosts (a /25 subnet), violating the design requirement to keep subnet size minimal.