Pioneer, PoE, and USB hotspot?

Can the Pioneer be run via Power over Ethernet? (After my search for “PoE” returned nothing, I looked for “Ethernet” and “power” together, but found only disparate results.) I’m new to networking, so I don’t know if such connectivity is a given, or so rare as to not be considered viable.

If the Pioneer can indeed be supplied by PoE, then my question becomes: On the initial boot, would it synch with the Ethernet switch at the expense of a USB connection to a mobile hotspot? (In other words, would it seek the Internet via the wrong peripheral?)