TCP/IP Model

A majority of the internet uses a protocol suite called the Internet Protocol Suite also
known as the TCP/IP protocol suite. This suite is a combination of protocols which
encompasses a number of different protocols for different purpose and need. Because
the two major protocols in this suites are TCP (Transmission Control Protocol) and IP
(Internet Protocol), this is commonly termed as TCP/IP Protocol suite. This protocol suite
has its own reference model which it follows over the internet. In contrast with the OSI
model, this model of protocols contains less layers.

This model is indifferent to the actual hardware implementation, i.e. the physical layer of
OSI Model. This is why this model can be implemented on almost all underlying
technologies. Transport and Internet layers correspond to the same peer layers. All three
top layers of OSI Model are compressed together in single Application layer of TCP/IP
Model.