Bonjouris Apple's implementation of zero-configuration networking. Apple documentation explains that Bonjour uses multicast DNS (mDNS) to allow devices to automatically discover services such as printers, file sharing, or AirPlay-enabled displays on a local network. It does not optimize roaming or manage wireless standards like 802.11r or 802.11v. The main purpose of Bonjour is discovery and advertisement of network services without requiring manual DNS or IP configuration. In enterprise environments, Bonjour can be extended or bridged across subnets with special controllers, but its core functionality remains service discovery in a LAN context.
References:Apple Platform Deployment - "Bonjour and zero-configuration networking."