What does subnet mask 24 mean?

Subnet Mask 24 Meaning

A subnet mask is a string of 32-bit binary numbers used to divide an IP address into a network ID and a host ID. A subnet mask of 24 means that the network ID occupies the first 24 bits of the IP address, while the remaining 8 bits are used to identify the host.

Detailed description:

• Network ID: Subnet mask 24 specifies that the network ID consists of the first 24 digits of the IP address. For example, IP address 192.168.1.100 has a network ID of 192.168.1.0.
• Host ID: The remaining 8 bits are used to identify the specific host connected to this network. In the previous example, the host ID is 100.
• Broadcast address: In a network defined by subnet mask 24, the broadcast address is the address of all hosts whose ID bit is 1. For subnet mask 24, the broadcast address is 192.168.1.255.
• Subnet size: Subnet mask 24 creates a subnet with 254 valid host addresses (excluding network IDs and broadcast addresses).

Example:

• IP address: 192.168.1.100
• Subnet mask: 24 (11111111.11111111.11111111.00000000)
• Network ID: 192.168.1.0
• Host ID: 100
• Broadcast address: 192.168.1.255

Subnet mask 24 is widely used Home networks and small business networks because it provides a sufficient number of host addresses while maintaining a relatively simple network configuration.

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