1.3 Computer Networks, Connections and Protocols

In this module, we explore how devices communicate and share data from local setups to global systems. Understanding these networks is key to demystifying the inner workings of modern computing.

We’ll begin by examining network types and topologies, learning how devices connect and interact within different network structures. You’ll explore essential hardware used in Local Area Networks (LANs) and understand factors that influence network performance. We’ll also uncover the role of the Internet as a global collection of networks, including concepts like hosting, DNS, and cloud computing.

Next, we’ll dive into the technologies that underpin modern networking—wired and wireless connections, protocols like HTTP and TCP/IP, and the importance of encryption for secure data transmission. Finally, we’ll introduce the 4-layer TCP/IP model, breaking down how data flows across networks in a structured and efficient manner.

By the end of this module, you’ll have a clear understanding of how networks operate, the hardware and protocols involved, and the principles that ensure smooth and secure communication between devices.