Ethernet can use either hub and spoke or "daisy chained" (actually tapped backbone) wiring with any of four wiring types -- 10Base2 Thinet (50 ohm -- RG58 coaxial cable) -- 10Base5 Ethernet (78 ohm -- RG62 coaxial cable sometimes used with a 15 pin DUI connector) -- 10MHz 10BaseT (Unshielded twisted pair -- 4 wires used] -- 100MHz 100BaseT [Also Unshielded Twisted Pair]. 10-BaseT allows nodes to be 1000 meters from the hub. 100BaseT is limited to 100 meters from the hub. 1000Base T will use a different (larger) packet size so that collision detection can work beyond 10 meters.
10MHz and 100Mhz Ethernet have different rules for cascading hubs. 100MHz wiring is much less tolerant of interference sources such as fluorescent lights.
Note: The original posting date on this article seems to be lost forever.
Return To Index Copyright 1994-2008 by Donald Kenney.