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Also known as: NNTP status code, three-digit reply
The three-digit number opening every server reply. The first digit gives the class: 1xx informational, 2xx the command succeeded, 3xx the server wants more data such as an article body, 4xx the command was understood but failed, 5xx the command was not recognized or not permitted. The second and third digits narrow it down, as with 430 for a missing article.
Browse all terms in Protocol & Server Infrastructure, or see the full Usenet glossary.