Notes on  LEAF SITE 

[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. Now that traffic patterns depend more on the
distribution of routers than of host machines this term has largely
fallen out of use.

J3N Research Labs

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