Comment by aidenn0

I'm really surprised that RFC-1122 isn't mentioned in the entire article; The IETF defines 3 layers for a TCP/IP network (link, IP, and Transport) and those layers are (IMO) much more useful for understanding the internet than the OSI model. In addition they don't pretend to be describing a platonic ideal of a network, but rather just specific parts of the network we are using today.