QDN is a data network unlike any other that has ever been built. It is a completely decentralized and distributed encrypted data network with a blockchain security and authentication layer. All of the data published on QDN is encrypted and chunked, even 'public data'. Due to this, unless the user accessing the data is using Qortal (with either a local node or 'gateway node') they cannot see any files. This means that ISPs cannot see the data, and neither can anyone viewing the data on a disk without viewing through Qortal.

Websites published on Qortal are built 'local'. This means that creating a site on Qortal is done by creating a site on your computer in a folder, then zipping that folder and publishing on QDN.

Linking from one Qortal name to another is now possible as well. Opening the doors for many new things to take place that were not possible in previous versions. As of version 4.0, Qortal has gained the huge new functionality of Q-Apps. Allowing 'rebuilding the internet' to really start taking place.

The theoretical potential of QDN is limitless, and as things continue to progress, the features will continue expanding as well. With the roll-out of Q-Apps, Qortal has gained a whole new level of potential functionality.

The initial version of QDN brought with it the ability to publish 'static websites'. Those are useful, but not nearly as useful as websites that allow authentication with Qortal accounts, file publishing, payment options, and much more that has come now with the release of Q-Apps.

This website is meant to be the place to come to learn about the new and exciting features made available on QDN, as they take place. It will be updated continually to demo new functionality, and provide instruction on how to make use of said functionality.

Q-Apps have ushered in a new era for Qortal, wherein the potential is practically limitless, and the sky's the limit on the practical use cases for the new and exciting features, Even with the existing 500MB 'single publish limit'. 

Remember, QDN is not an 'upgrade' to the traditional internet, It is a complete REBUILD and REPLACEMENT of it. Therefore, no 'external links' (to 'the internet') will ever be possible on QDN. However, the previous limit that enforced having to have all of the files within a single-publish website is now removed! Cross-name linking allows expanded user interaction, expanded site functionality, and fundamental features that were previously not possible. All without reaching outside of the distributed network of QDN.

Websites, Q-Chat, Q-Blog posts, and more can now link directly to other content on QDN.

This functionality brings a whole new level of interactivity, and should spark quite a bit of creativity in existing web developers, allowing them to really build something special on Qortal.

All data still needs to reside on QDN, but with publishing multiple files/images/videos/music in various Q-Apps and linking to them from your website, there may as well be no limit!