OSI Model: https://en.wikipedia.org/wiki/OSI_model
https://www.iana.org/numbers
https://en.wikipedia.org/wiki/List_of_assigned_/8_IPv4_address_blocks
Private Addresses RFC1918: https://tools.ietf.org/html/rfc1918
Prefixes: https://www.ripe.net/about-us/press-centre/understanding-ip-addressing