Dual-Speed Stackable Hubs User’s Guide
Making Connections 19
♦ The maximum length of a twisted-pair cable segment is 100 meters.
Cabling should be Category 3 or better.
♦ Between any two end-stations in a collision domain, there may be up
to five cable segments and four intermediate repeaters (hubs, hub
stacks, or other repeaters).
♦ If there is a path between any two end-stations containing five seg-
ments and four repeaters, then at least two of the cable segments
must be point-to-point link segments (e.g., 10BASE-T, 10BASE-
FL), while the remaining segments may be populated (mixing) seg-
ments (e.g., 10BASE-2 or 10BASE-5).
Fast Ethernet (100Mbps) networks need to respect the following connec-
tivity rules:
♦ The maximum length of a twisted-pair segment (that is, the distance
between a port in the hub to a single-address network device such as
a PC, server, or Ethernet switch) is 100 meters. Cabling and other
wiring should be certified as Category 5 or shielded twisted pair
(STP).
♦ The maximum diameter in a collision domain is about 205 meters
using two Class II hubs (or hub stacks).
♦ Between any two end-stations in a collision domain, there may be up
to three cable segments and two Class II hubs or hub stacks.
Hub to End-Station Connection
After the hub properly installed, it can support up to eight end-station con-
nections. Fast Ethernet connection requires either a Category 5 UTP cable
or an STP cable. These cables can be up to 100 meters long.
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