A subnet mask (or number) is used to determine the number of bits used for the subnet and host portions of the address. The mask is a 32-bit value that uses one-bits for the network and subnet portion [..]

The bits of an Internet Protocol (IP) address used for a subnetwork.

A representation of a user's Internet address where all of the bit positions corresponding to the user's network and subnetwork id are 1's and the bit corresponding to the user's host id are 0's.

A number that is used to identify a subnetwork so that IP addresses can be shared on a local area network.

Internet Glossary A mask used to determine what subnet an IP address belongs to. An IP address has two components, the network address and the host address. For example, consider the IP address 150.215.017.009. Assuming this is part of a Class B network, the first two numbers (150.215) represent the Class B network address, and the second two numbe [..]

A bit mask used to select bits from an Internet address for subnet addressing.

A 32-bit identifier indicating how the network is split into subnets. The subnet mask indicates which part of the IP address

IP (Internet Protocol) are 32-bit binary numbers usually written as a decimal dotted quad, e.g. 65.110.21.43 . There is some additional structure in the number, called the net, subnet and hostnumber. [..]

The routing prefix of a designated IP address

32-bit value, defining the sections of the IP address that refer to the network and the network station respectively.

This is a difficult concept to express succinctly. If it is new to you, please begin by reading the entry for IP address

A method of hiding the network address portion of an IP address. It does so by assigning a 1 to every digit in the network address. This prevents the network address portion of the IP address from being changed when assigning IP addresses to machines or devices on the local network.

A numeric designation, with the same format as an IP address, which determines how much of an IP address is used to partition a network using TCP/IP into smaller entities called subnets.

A subnet mask is a 32-bit number used to differentiate the network component of an IP address by dividing the IP address into a network address and host address. It does so with bit arithmetic whereby [..]