On a TCP/IP network, the value called a bitmask used to separate the IP address of a device into two parts: a network ID and a device ID. This allows you to divide up large networks into smaller networks called subnets.
On a TCP/IP network, the value called a bitmask used to separate the IP address of a device into two parts: a network ID and a device ID. This allows you to divide up large networks into smaller networks called subnets.