Year	Duplex	Medium	Mbit/s	Switch
1994?	Half	Coaxial	10	-
2001	Full	Twisted pair	100	×5 = 500
2005			1000	×8 = 8000
2021			2500	×6 = 15000
			5000	×2+2500×4 = 20000
			10000	×2+2500×4 = 30000