However, it is important to note that the 100BaseTX constrains the collision domain
distance between two repeaters to 5 meters, and between the repeaters and terminal devices to 100 meters.
The collision domain
was too large and the broadcast ratio was too high.
At the time of the original network analysis, the city had a flat network with one collision domain
3u/D3) defines maximal diameters for a collision domain
(equal to the maximal allowed half-duplex network span) in meters:
A LAN switch interconnects any number of LAN segments that would otherwise share the same collision domain
and (in the case of Ethernet) occupy a single 10 Mb/s pipe.
By linking two stacks it is possible to have 144 ports in one collision domain
; however, having that many users in one collision domain
may not be wise tactically.