“Have you tried switching it off and on again?” “The Wi-Fi must be down!” “How come I can’t see the cloud up in the sky?” Computing systems and networks is one of those computer science topics in which misconceptions abound, and learners can struggle to grasp its abstract concepts. This issue offers ideas and inspiration for unpacking those tricky concepts with your learners. We discuss the research into different approaches to teaching networking, before seeing some of those methods in action. We explore the merits of inviting a network manager into your classroom, profile a number of different network simulator tools, and delve into ways to make networks concrete for primary learners.