leaf site: n.,obs. Before pervasive TCP/IP, this term was used
of a machine that merely originated and read Usenet news or mail,
and did not relay any third-party traffic. It was often uttered in
a critical tone; when the ratio of leaf sites to backbone, rib, and
other relay sites got too high, the network tended to develop
bottlenecks. Compare backbone site, rib site. Now that traffic
patterns depend more on the distribution of routers than of host
machines this term has largely fallen out of use.
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