When this term is used to describe a file-sharing network, DarkNet is often used as a synonym for the phrase "friend-to-friend" ("from friend to friend") - these two concepts describe networks in which direct connections are established only between two peers that are each other. trust a friend. Such networks are otherwise called closed p2p (Private peer-to-peer).

The most common file sharing services, such as BitTorrent, are not really darknets, as users can connect with anyone on the network.

Almost all known darknets are decentralized and therefore considered peer-to-peer.

The dark web uses domains that cannot be accessed through the regular web using standard browsers. Often, these are pseudodomains in the .onion or .i2p domain zone and others  . The site address often uses a random set of characters or a cipher, for example: facebookcorewwwi.onion is a dark web mirror of the Facebook social network that cannot be opened in a regular browser.

In 2016, British cybersecurity experts analyzed the content of a sample of darknet websites using a search engine configured to track and categorize the content found by a number of keywords (Eng. Weapons - weapons, eng. Illegal Pornography - illegal pornography, eng. Extremism - extremism, etc.) Among the total number of 5,205 sites surveyed, only 2,723 active sites were found, and illegal content was found on 1,547 sites. According to the authors of the study, the most widespread in darknet networks are virtual platforms for drug trafficking and financial crimes.

I am sure that it will be useful for you to learn more about deepweb links if you are interested in this area