Networks: from semaphores to the Internet

In this lesson, we will contemplate the number of internet connected devices on the planet and define a computer network. We will learn about the rules of communication (protocol) in simple terms and think about how data is transmitted across the internet.

In this lesson, we will explore the functionality of key hardware components found in a network such as cables, hubs, servers and routers. We will then use our knowledge of each component to build a series of increasingly complicated network diagrams.

In this lesson, we will explore the different wireless technologies, and how bandwidth varies between them. We will discuss the mobile technologies of 3G, 4G, and 5G and will develop an understanding of the term 'bandwidth'.

In this lesson, we will explore the internet and its uses. We will gain an appreciation of the vastness of the internet and learn how messages can be successfully sent from one device to another across the planet in under a second using packets and IP addresses.

In this lesson, we will explore the internet and its services as well as the difference between the internet and the World Wide Web. We will explore the 'Internet of Things' and think about the advantages as well as disadvantages, focussing on privacy and security.

In this lesson, we will introduce the key components of the World Wide Web. We will understand the difference between HTTP and HTTPS protocols.