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A subnet is a network within a network. Learn how subnetting makes network routing more efficient, and explore how subnet masks and IP address classes work. Subnetting is the process of dividing a large network into smaller networks called subnets. Each subnet provides its own space for devices to communicate, improving network performance, security, and management. Example: In a company, different departments (Sales, HR, IT) can have their own subnets, keeping their traffic separate and organized. Subnetting Why Subnetting is Important Let's consider a company that follows classful addressing, it has a Class C network (192.168.1.0/24) with 256 ... A subnet mask is a 32-bit number that divides an IP address into network ID and host ID. 1s represent the network portion. 0s represent the host portion. It helps determine whether two devices are on the same local network or different ones. For example: Learn how to use subnet mask values and CIDR notation to calculate the number of IP addresses and usable IP addresses in a network. Find a simple cheat sheet with charts and explanations for 24, 30, 26, 27, 29, and other subnet masks.
