Verifying subnet calculations involves confirming that the subnetting process has been performed correctly and that the resulting subnets meet the specified requirements. Here's how you can verify subnet calculations:

1. Check Subnet Mask Length:

  1. Ensure that the chosen subnet mask length (/n notation) aligns with the desired number of subnets and hosts per subnet.
  2. Verify that the subnet mask length effectively partitions the IP address space into the required number of subnets with the appropriate number of host addresses.

2. Calculate Subnet Size:

  1. Recalculate the subnet size using the formula \(2^{(32 - \text{subnet mask length})}\).
  2. Compare the calculated subnet size with the expected number of IP addresses per subnet.
  3. Ensure that the subnet size is sufficient to accommodate the desired number of hosts per subnet.

3. Determine Number of Hosts per Subnet:

  1. Verify that the number of hosts per subnet has been calculated correctly by subtracting 2 from the total number of IP addresses in each subnet.
  2. Confirm that the resulting number of hosts per subnet aligns with the specified requirements.

4. Check Subnet Addressing:

  1. Verify that each subnet has been assigned a unique subnet address within the original network range.
  2. Ensure that there is no overlap or duplication of subnet addresses.
  3. Confirm that the subnet addresses fall within the appropriate range for the chosen subnet mask length.

5. Validate Subnet Boundaries:

  1. Check that the subnet boundaries are correctly defined and aligned with the subnet mask.
  2. Verify that the first and last IP addresses in each subnet correspond to the network address and broadcast address, respectively.

6. Test Subnet Configuration:

  1. Configure a network device (e.g., router, switch) with the subnetting parameters and verify its operation.
  2. Assign IP addresses to devices within each subnet and verify connectivity and communication between devices within the same subnet and across different subnets.

7. Document Subnetting Scheme:

  1. Document the subnetting scheme, including subnet addresses, subnet mask lengths, and the number of hosts per subnet.
  2. Keep records of the subnet allocations and any changes made to the network configuration.

By following these verification steps, you can ensure that your subnet calculations are accurate and that the resulting subnets meet your network requirements effectively. Regular verification and testing help maintain the integrity and performance of the subnetted network.