IP addresses1 min read
What is a subnet mask?
Why 255.255.255.0 and /24 are the same thing, how a mask separates network from host, and what wildcard masks are.
#CIDR
- IP addresses2 min read
CIDR and subnets, explained with examples
What /24 means, how to calculate network and broadcast addresses, and how to split a network into subnets — without memorising tables.