Workstations vs. Servers vs. PC

To buy a personal computer, we know that there are desktops, business books, game books, but occasionally have seen workstations. If you are working in the enterprise also know that there are servers. What are the differences of workstations, servers…
PoE vs. PoE+ vs. UPoE (PoE++)

Do you hear about PoE switch? We know that some of small network devices can be powered by ethernet, that is, we say PoE. PoE switches are the equipment which can power small network device. Now there are not only…