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5-4-3 Rule for Coax
A legacy coax network can
have at most 5 segments, with a maximum of 4 repeaters,
and only 3 segments can have computers on them. Why would you
want a segment without computers?
Because there might be more than
185 or 500 meters between two groups of computers which need to be connected
together, requiring that you run another segment of cable to connect
the two groups. The minimum distance is 2.5 meters, between
the backbone to segment taps, over 10Base5 cable, and
0.5 meters between stations connected via 10Base2 cable. The repeater
is a network device that will take in a network signal on one side,
regenerate it, and send it out again on the other side, stronger, allowing
a signal to travel more than 185 or 500 meters between network host
computers.
Up to 100 computers
may be attached on any one segment with 10Base5, or up
to 30 when using 10Base2.
 The 5-4-3 Rule
Coax has a maximum of 5 Segments, 4 Repeaters and 3 active segments on a coax network.
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