SMC Networks 1000 manual Application Notes, Mbps Ethernet Collision Domain, SMC 5-4-3 Rule

NETWORK PLANNING

10 Mbps Ethernet Collision Domain

SMC 5-4-3 Rule

Between any two PCs or other stations in the same 10 Mbps collision domain, there may be:

•up to 5 link segments in series,

•up to 4 repeaters (hubs),

•up to 3 populated cable segments, that is, segments attached to two or more PCs (coax networks only).*

*The remaining two segments are unpopulated; these are known as inter-repeater links or IRLs. This distinction between populated and unpopulated segments is significant for coax networks only.

Maximum Cable Length

Cable Type	Maximum Length
Twisted Pair, Categories 3, 4, 5	100 m (328 ft.)
Thin Coax	185 m (607 ft.)
External Transceiver Drop	50 m (165 ft.)

Application Notes

1.Full-duplex operation only applies to point-to-point access, such as when a switch is attached to a workstation, server or another switch.

2.For network applications that actually require routing, such as when interconnecting dissimilar network types or distinct VLANs, you may have to attach the TigerSwtich 1000 directly to a router or Layer 3 switch.

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