The sites are not only accessible through Google. Currently, it’s just a very small part of the internet. However, the Web can be divided into three main components, namely the Surface Web, the Deep Web and the Dark Web.
Most people believe the web is the Surface Web. Particularly in online content, search engines or links can be easily accessed. This includes your chosen blog entries, Facebook profiles, news stories, and others, which are general knowledge that search engines such as Google or Bing index.
The “dark web” is a subset of the “deep web”. The deep web is just the part of the web that isn’t accessible by search engines. You won’t find these websites when you use a search engine like Google or Bing, but they are otherwise normal websites. The “dark web” is a smaller part of the deep web that can’t be accessed without special software.
The dark web is a decentralised network of internet sites that try to make users as anonymous as possible by routing all their communications through multiple servers and encrypting it at every step.
The darknets which constitute the dark web include small, friend-to-friend peer-to-peer networks, as well as large, popular networks such as Tor, Freenet, I2P, and Riffle operated by public organisations and individuals. Users of the dark web refer to the regular web as Clearnet due to its unencrypted nature. The Tor dark web or onionland uses the traffic anonymisation technique of onion routing under the network’s top-level domain suffix (.onion).