Industry 4.0, cyber-physical systems and Internet of Things are much more than just buzz words, they are describing the idea of networked production. Exactly this networked production has processing and analytical capabilities at each node and can exchange information (not just data) between one another. This enables new opportunities of monitoring, optimisation and control, but also requires additional skill to build and maintain such systems. The domain experts as well as the IT has to work closely together. Both sides need to understand the idea of the underlying concepts as well as the problems that may arise. The communication technology is the glue, and therefore one of the core technologies required for such modern production systems. Hence, every engineer and IT-specialist who wants to work in such future systems should start to understand these concepts and to use them.