What is the formula for usable hosts?

Number of usable hosts = (2 ^ (32 - CIDR)) - 2. We subtract 2 for the Network and Broadcast addresses.

Why use CIDR notation?

CIDR (Classless Inter-Domain Routing) is more flexible than traditional IP classes (A, B, C), allowing for more efficient IP address allocation.

Determine IPv4 network ranges, usable hosts, broadcast channels, and binary subnet masks.

Subnetting divides a large IP network into smaller, manageable sub-networks. A /24 subnet (255.255.255.0) provides 254 usable host addresses.

IP Subnet Calculator | CIDR, Subnet Mask & IP Range | Trezoriq