Power over Ethernet (PoE) enabled (requires separate PoE HAT)
...
What you need to make it run
Headless - running without a monitor, keyboard or mouse.
Control is via the network - VNC or SSH.
A micro SD card with an operating system on it. I
recommend you start with Raspbian - either the
image or NOOBS. NOOBS is easy. Copy all the
files to an empty micro SD card and boot it.
Copying the image requires extra software for Windows.
The end result is the same. (This appears to have
changed. See below.)