Do all messages travel to all news servers?
Ideally, all articles in a newsgroup would travel to all news servers that carry the newsgroup. When you post an article, the result is tens of thousands of copies, all over the world. More specifically, when you post an article, it goes first to your local news server (operated e.g. by your ISP or school). Your server then sends copies of the article to its “neighbours”, that is, to servers with which it has agreed to exchange articles. Those servers, in turn, send copies to their neighbours. Eventually, every server that carries the newsgroup has a copy.
