> For the complete documentation index, see [llms.txt](https://docs.wesendit.io/en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wesendit.io/en/wesendit-node-network/functionality.md).

# Functionality

The WeSendit network consists of three types of nodes that perform specific functions, from data compression and distribution to managing data integrity and availability. The division into Checknet, Testnet, and Mainnet allows for differentiated functionality and security levels within the network.