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5-4-3 rule

A guideline for designing a shared Ethernet network (not switched Ethernet) for an optimal flow of traffic. The 5-4-3 represents the creation of a single collision domain, and the numbers are maximums: (5-) no more than five segments between any two nodes that communicate with each other, (-4-) no more than four repeaters in those five segments, and (-3) no more than three of the five segments can have active devices (clients or servers). See shared Ethernet and switched Ethernet.



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4mm tape5 ATM
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4QAM5 GHz band
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4S5-pin to 11-pin adapter
4th generation language5.1 channel
4U5.25 inch
4x CD-ROM50 GbE
4x DVD50 Gigabit Ethernet
4xAGP50-pin Telco connector

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