The TCP/IP Model

Introduction

• The TCP/IP Model, also known as the Internet protocol suite, was developed in 1989.

• Its development was funded by DARPA (Advanced Research Projects Agency (ARPA) was renamed to the Defense Advanced Research Projects Agency (DARPA)!)

• Its technical specifications are detailed in RFC 1122.

• This model is primarily based upon the most protocols of the Internet, namely the Internet Protocol (IP) and the Transmission Control Protocol (TCP).

• The protocols in each layer are clearly defined, unlike in the OSI model. In this course, we’ll largely adhere to the TCP/IP model and take a protocol-oriented approach.