What you need to know !

TCP/IP and OSI Model History

• Today, the world of computer networking uses one networking model TCP/IP

 

• The OSI Model was created by the International Organization for Standardization (ISO) in the late 1970’s in an effort to standardize data networking protocols to allow communication among all computers across the world.

 

• TCP/IP Model was developed in the 1970’s , which sprouted forth from a U.S. Department of Defense (DOD) Contract.

 

• The OSI Model is no longer used in todays network. But since it was the first attempt to make a standard networking model. Many of the terms associated with the OSI model are still used today.

 

TCP/IP Model Overview

• The TCP/IP model both defines and references a large collection of protocols that allow computers to communicate.

 

• There are two TCP/IP models, the “Original” and “Updated”. The original model has four layers and the updated model has five.

• The top two layers of the TCP/IP model focus more on the applications that need to send and receive data.

 

• the bottom layer focuses on how to transmit bits over each individual link.

 

• The internet layer focusing on delivering data over the entire path from the original sending computer to the final destination computer.

 

Example of protocols used at each layer of the TCP/IP model.