IP model
(The five layer Internet protocol stack))
What Is TCP/IP?/
The large collection of networking protocols and services called
TCP/IP denotes far more than the combination of the two key
protocols that gives this collection its name.
These protocols deserve an initial introduction: Transmission
Control Protocol, or TCP, handles reliable delivery for messages
of arbitrary size, and defines a robust delivery mechanism for all
kinds of data across a network.
The Internet Protocol, or IP, manages the routing of network
transmissions from sender to receiver, along with issues related
to network and computer addresses, and much more.