2004-05-21 2009-03-20 0-26 Reserved 27-4294967295 First Come First Served 0 IEEE 802.3 1 IEEE 802.4 Token Bus 2 IEEE 802.5 Token Ring 3 IEEE 802.6 Metro Net 4 Ethernet 5 HDLC 6 Character Synchronous 7 IBM Channel-to-Channel 8 FDDI 9 Other 10-15 Reserved 16 Fibre Channel 17 ATM 18 ATM Classical IP 19-25 Reserved 26 IP over Infiniband 27-4294967295 Unassigned