Anonymity networks function by routing internet traffic through a series of nodes or relays, effectively masking the user's IP address and making it difficult for third parties to track their online activities. The most well-known examples include Tor (The Onion Router) and I2P (Invisible Internet Project). These networks employ techniques such as encryption, traffic obfuscation, and multi-layer routing to ensure that user data remains private. Additionally, users accessing these networks often use specific software designed to interface securely with the anonymity network, which plays a critical role in maintaining the user's anonymity.