There are two mainstream Dark Webs: Tor and the Invisible Internet Project (I2P) These two are the most popular. Tor allows anonymous, encrypted communication from host to host. Silk Road, one of the most notorious websites that existed on the Deep Web, was a site that specialized in buying, selling and trading all types of illegal contraband. After the first seizure of all Silk Road assets, another replacement site was born, dubbed Silk Road 2.0. Silk Road has now moved to the I2P network.”]
Source: https://securityintelligence.com/the-deep-web-whats-lurking-in-the-underbelly-of-the-internet/