In this subject, you will learn how computer networks are constructed, how they work, and how modern applications use the services provided by modern computer networks. The concept of protocol layering will be explored to learn how computer networks operate, using the OSI Model and TCIP/IP protocol suite as examples, including an examination of the functionality and protocols provided by the different layers of these systems. Through practical tasks, you will learn how to construct and configure computer networks and how various network protocols act and react to establish a functioning computer network.