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Also known as: filler server, fill account
A secondary news server queried only for articles the primary one cannot supply. Because backbones propagate independently, an article missing from one network is often present on another, so a small block account on a different backbone can rescue sets that would otherwise be incomplete. Download clients handle this through server priority settings, trying the cheap primary first and falling through on 430 responses.
Browse all terms in Binaries, Encoding & Repair, or see the full Usenet glossary.