Please Whitelist This Site?

I know everyone hates ads. But please understand that I am providing premium content for free that takes hundreds of hours of time to research and write. I don't want to go to a pay-only model like some sites, but when more and more people block ads, I end up working for free. And I have a family to support, just like you. :)

If you like The TCP/IP Guide, please consider the download version. It's priced very economically and you can read all of it in a convenient format without ads.

If you want to use this site for free, I'd be grateful if you could add the site to the whitelist for Adblock. To do so, just open the Adblock menu and select "Disable on tcpipguide.com". Or go to the Tools menu and select "Adblock Plus Preferences...". Then click "Add Filter..." at the bottom, and add this string: "@@||tcpipguide.com^$document". Then just click OK.

Thanks for your understanding!

Sincerely, Charles Kozierok
Author and Publisher, The TCP/IP Guide


NOTE: Using software to mass-download the site degrades the server and is prohibited.
If you want to read The TCP/IP Guide offline, please consider licensing it. Thank you.

The Book is Here... and Now On Sale!

The whole site in one document for easy reference!
The TCP/IP Guide

Custom Search







Table Of Contents  The TCP/IP Guide
 9  TCP/IP Application Layer Protocols, Services and Applications (OSI Layers 5, 6 and 7)
      9  TCP/IP Key Applications and Application Protocols
           9  TCP/IP File and Message Transfer Applications and Protocols (FTP, TFTP, Electronic Mail, USENET, HTTP/WWW, Gopher)
                9  Usenet (Network News) and the TCP/IP Network News Transfer Protocol (NNTP)
                     9  TCP/IP Network News Transfer Protocol (NNTP)

Previous Topic/Section
NNTP Inter-Server Communication Process: News Article Propagation
Previous Page
Pages in Current Topic/Section
1
234
Next Page
NNTP Commands
Next Topic/Section

NNTP Client-Server Communication Process: News Posting and Access
(Page 1 of 4)

The propagation of Usenet articles is indeed a defining function of the Network News Transfer Protocol (NNTP)—would I lie to you? J However, one critical area where NNTP differs from its progenitor, SMTP, is that NNTP is used not just for inter-server communication. It is also the protocol utilized for the initial posting of Usenet messages, and reading them as well. In fact, the majority of NNTP commands deal 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 provide two main capabilities to a user: posting (creating) and reading Usenet messages. Usenet newsreaders exist for virtually all hardware and software platforms, and range greatly in terms of capabilities, user interface and other characteristics. Most people today use a Usenet newsreader on a client computer that must make NNTP connections to a separate NNTP server to read and post news. These programs are analogous to e-mail clients, and in fact, many e-mail clients also function as NNTP clients.

News Posting

Posting a Usenet message is the first step in the overall Usenet communication process (although many Usenet articles are actually replies to other articles, so it's a bit of a “chicken and egg” thing.) Article posting is quite straight-forward with NNTP. The client establishes a connection to the server and issues the POST command. If the server is willing to accept new articles it replies with a prompt for the client to send it the article. The article is then transmitted by the client to the server. Some newsreaders may “batch” new articles so they can be sent in a single NNTP session rather than submitting them one at a time.


Previous Topic/Section
NNTP Inter-Server Communication Process: News Article Propagation
Previous Page
Pages in Current Topic/Section
1
234
Next Page
NNTP Commands
Next Topic/Section

If you find The TCP/IP Guide useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider purchasing a download license of The TCP/IP Guide. Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005

© Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.