NNTP Client-Server Communication Process: News Posting and Access

One critical area where NNTP differs from its progenitor, SMTP, is that NNTP is not just used for interserver communication. It is also used for the initial posting of Usenet messages, as well as reading the messages. In fact, the majority of NNTP commands deals with the interaction between user client machines and NNTP servers, not communication between servers.

An NNTP client is any software program that knows the NNTP protocol and is designed to provide user access to Usenet. NNTP clients are usually called newsreaders, and they provide two main capabilities to a user: posting and reading Usenet messages. Usenet newsreaders exist for virtually all hardware and software platforms, ...

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