A network is a collection of computers or other devices called nodes that communicate with each other on a-shared network medium. This unit is dedicated to data communication over computer networks and the protocols that make it possible. It describes how computer network are created and what their advantages are.

• Network communicaiton introduction 
• Modes of Communication
• Communicaiton Media and Network architecture
• Network Topologies
• OSI Model and concepts of its layers
• Provide examples of protocols and devices at each layer of OSI Model 
• Describe TCP/IP protocol suite used for communication over the internet.
• Compare eie TCP suits with OSS Modd.