The exp-net2 suffix typically refers to an "experimental" or "extended" network-optimized build designed to handle data syncing more efficiently in large multiplayer environments. Where to Download and Installation Guide
Navigate to .minecraft/mods (create the folder if it doesn't exist). questbook-3.1.exp-net2-1.12.jar download
To ensure a safe and working installation, users should prioritize official repositories. The exp-net2 suffix typically refers to an "experimental"