The whole world is connected with light these days. You probably don't know, or notice (your desktop is just plugged into an rj45 wall jack, right?), but it's likely that your home or office network has some kind of fibre optics in it's path to the Internet, or the other sites in your WAN. In this talk I'll try and explain some of the risks around using fibre optics, as opposed to copper technologies, and what you can do about detecting and protecting from them (what is that encryption stuff anyway?). I'll also try and explain some of the more commonly used types of fibre technologies and how they're all tied together, to give a better overview for those who just haven't had to work with the stuff before. This bit is probably just more informative than hackery related.