What is a Class C LAN?

InterNIC divides IP addresses into five categories: A reserved for government agencies, B allocated to medium-sized companies, C allocated to anyone who needs it, D used for multicast and E used for experiments. The number of addresses that can be accommodated in each category is different.

Characteristics of class A, B and C IP addresses: When the IP address is written in binary form, the first digit of class A address is always O, the first two digits of class B address are always 10, and the first three digits of class C address are always 1 10.

IP address reservation: All zeros IP address in the host is reserved for network address, all zeros IP address in the host is reserved for broadcast address, and 224-255 is reserved for multicast and experiment.

That's what the book says, and it's general. I built my own LAN, but I didn't just set up an ip!