Bonjour enables service discovery on a LAN. ThemacOS Deployment Referencestates, "Bonjour supports discovering services such as printers, file shares, and other resources on a local network." Options A, B, and D are unrelated to Bonjour’s function.
[References:, macOS Deployment Reference, "Bonjour" section., Apple Platform Deployment Guide, "Networking" section., , ]
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