Anonymous networks are systems that allow users to browse the internet without revealing their identities. They work by routing internet traffic through multiple servers, making it difficult to trace the original source of the data. This helps protect users' privacy and can be useful for accessing restricted content or communicating securely. One well-known example of an anonymous network is the Tor network, which uses a technique called "onion routing." In this method, data is encrypted and sent through several nodes, each peeling away a layer of encryption. This process ensures that no single node knows both the sender and the recipient, enhancing user anonymity.