Ipcalc

Ipcalc is a tool to split a physical IP network logical subnets (smaller networks) so that each of these work at sending and receiving packets as a single network, although all belong to the same physical network and the same domain collision.

Splitting a network into subnets allows better management, traffic control, security by segmenting the network by function and improves network performance by reducing broadcast traffic on the network.

This tool requires PERMIT WRITING because you can save and open the files generated, for this uses the standard XML format.