IT professionals (developers, network engineers) need easy access to subnet mask values and their meanings, so OpenVPN prepared this easy-to-use cheat sheet.
The subnet mask (also known as a prefix) sets the address range of usable IP addresses (octets made of host and network bits) within a network or subnet. Subnetting divides a larger network into smaller subnetworks. The 32-bit combination distinguishes two parts of an address: 1) one that refers to the subnet and 2) one that refers to the host. Numbers and decimals make up a subnet mask.
