Looks like these can be divided into tcpip-ports, bsd-ports, and maybe physical-ports, though that doesn't seem like a terribly useful tag to me (example question is What does COM Stand for in terms of Serial PortsWhat does COM Stand for in terms of Serial Ports).
Any objections or improvements? If not, I can go through and retag for the tcpip/bsd distinction, and remove the physical ports.