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Also known as: peer exchange
The arrangement under which two news servers exchange articles directly. Each side offers what it has, the other refuses anything whose Message-ID it already holds, and the Path header keeps articles from circling back. Dense peering shortens the route between a poster and a reader, improving both propagation speed and completion; a provider with few peers shows visible gaps on high-volume binary groups.
Browse all terms in Core Usenet Concepts, or see the full Usenet glossary.