5.1 Archives by Google Groups and DejaNews.2.2 Moderated and unmoderated newsgroups.On the Internet, Usenet is transported via the Network News Transfer Protocol (NNTP) on TCP Port 119 for standard, unprotected connections and on TCP port 563 for SSL encrypted connections. The first commercial spam on Usenet was from immigration attorneys Canter and Siegel advertising green card services. The first Usenet group was NET.general, which quickly became net.general. The name Usenet comes from the term 'users' network'. In the early 1990s, shortly before access to the Internet became commonly affordable, Usenet connections via Fidonet's dial-up BBS networks made long-distance or worldwide discussions and other communication widespread, not needing a server, just (local) telephone service. Usenet is culturally and historically significant in the networked world, having given rise to, or popularized, many widely recognized concepts and terms such as ' FAQ', ' flame', sockpuppet, and ' spam'. However, unlike BBSs and web forums, the dispersed nature of Usenet usually permits users who are interested in receiving some content to access it simply by choosing to connect to news servers that carry the feeds they want. This results in the automatic proliferation of content posted by any user on any server to any other user subscribed to the same newsgroups on other servers.ДЄs with BBSs and message boards, individual news servers or service providers are under no obligation to carry any specific content, and may refuse to do so for many reasons: a news server might attempt to control the spread of spam by refusing to accept or forward any posts that trigger spam filters, or a server without high-capacity data storage may refuse to carry any newsgroups used primarily for file sharing, limiting itself to discussion-oriented groups. Individual users may read messages from and post to a local (or simply preferred) news server, which can be operated by anyone, and those posts will automatically be forwarded to any other news servers peered with the local one, while the local server will receive any news its peers have that it currently lacks. Usenet is distributed among a large, constantly changing set of news servers that store and forward messages to one another via 'newsВ feeds'. ДЄ major difference between a BBS or web message board and Usenet is the absence of a central server and dedicated administrator or hosting provider. Discussions are threaded, as with web forums and BBSs, though posts are stored on the server sequentially. Usenet resembles a bulletin board system (BBS) in many respects and is the precursor to the Internet forums that have become widely used. Users read and post messages (called articles or posts, and collectively termed news) to one or more topic categories, known as newsgroups. Tom Truscott and Jim Ellis conceived the idea in 1979, and it was established in 1980. It was developed from the general-purpose Unix-to-Unix Copy (UUCP) dial-up network architecture. Usenet ( / Л€ j uЛђ z n Й› t/) is a worldwide distributed discussion system available on computers. Notably, clients never connect with each other, but still have access to each other's posts even when they also never connect to the same server. Arrows between clients and servers indicate that a user is subscribed to a certain newsgroup and reads or submits articles there. Coloured arrows between servers indicate newsgroup content exchanges (news feeds).

The coloured dots on the servers represent the newsgroups they carry.

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