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Wiring: thin coax
An alternative to twisted-pair
wiring is thin coaxial cabling,
often called thin coax. This
cabling is known as RG-58A or
RG-58U cable, and has an
impedance of 50 ohms. (It looks
similar to the 75-ohm thin
coaxial cable used in television
installations, but the television
cable will not work in a network.)
The connectors used with thin
coax are BNC connectors. The
cable is a continuous cable, up to
185 meters (606 feet) long, made
up of shorter segments with BNC
connectors at each end. It
connects to computers and other
devices along its length using
BNC "T" connectors, and there is
a 50-ohm terminator at each end
of the cable. This cabling scheme
does not use a hub.
A thin coaxial LAN operates at a
data rate of 10 mbps (megabits
per second), and is known as a
type 10Base2 network.
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