5-4-3 rule
DESIGN GUIDELINE FOR ETHERNET
543 rule; 5-4-3; 5-4-3-2-1 rule; 4-repeater rule; Four repeater rule; Four-repeater rule; Ethernet way versus ieee way; Ethernet Way versus IEEE Way; Ethernet way
The 5-4-3 rule, also referred to as the IEEE way, is a design guideline for Ethernet computer networks covering the number of repeaters and segments on shared-medium Ethernet backbones in a tree topology. It means that in a collision domain there should be at most 5 segments tied together with 4 repeaters, with up to 3 mixing segments (10BASE5, 10BASE2, or 10BASE-FP).