Thanks to the Maker Faire Berlin on 1st and 2nd of October, I was able to purchase a Pi Zero board, which currently is out of stock at most distributors. Indeed, it is a nice little board for experimenting with the GPIO header.
In contrast to other Pi versions, it features a micro USB port, which is capable to connect in USB OTG mode (On-The-Go) to a host-PC. Thus, there is no need for a power supply and WiFi dongle, since communication with the host-PC is established through USB networking. This is especially useful if you want to use the Pi Zero in headless mode, for example in a classroom environment already equipped with desktop PCs and/or notebooks.
There are already other tutorials which describe how to enable USB OTG mode on a Pi Zero. However, I’ve been struggling with configuration of a fixed IP and internet/ network connection through USB on the Pi Zero. So here are some helpful instructions on how to achieve this: