Variable Length Subnet Mask (VLSM) is a technique used in IP addressing to allocate IP addresses based on varying subnet requirements within a network. It allows for more efficient use of IP addresses by assigning subnets with different sizes according to their specific needs.
The VLSM calculator provided here helps network administrators or engineers to plan and configure subnets within a network efficiently. By inputting the network address and the number of hosts required for each subnet, the calculator generates the subnet details including the network address, subnet mask, usable IP range, broadcast address, and wildcard mask for each subnet.