Subnet masks (IPv4) and prefixes (IPv6) - IBM
www.ibm.com › docs › enOct 10, 2010 · Subnet masks (IPv4) and prefixes (IPv6) identify the range of IP addresses that make up a subnet, or group of IP addresses on the same network. For example, a subnet can be used to identify all the machines in a building, department, geographic location, or on the same local area network (LAN).
Networking Concepts — IPv6 — IPv6 Subnetting | pfSense ...
docs.netgate.com › network › ipv6Sep 17, 2020 · Using prefix lengths in multiples of four makes it easier for humans to distinguish IPv6 subnets. All that is required to design a larger or smaller subnet is to adjust the prefix by multiple of four. For reference, see Table IPv6 Subnet Table listing the possible IPv6 addresses, as well as how many IP addresses are contained inside of each subnet.