A machine that merely originates and reads Usenet news or mail, and does not relay any third-party traffic. Often uttered in a critical tone; when the ratio of leaf sites to backbone, rib, and other relay sites gets too high, the network tends to develop bottlenecks. Compare backbone site, rib site.
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Nearby terms: LEAF « leaf « Leaf Distribution Limited « leaf site » League for Programming Freedom » leak » leaky heap