A technician needs to deploy a network printer that will be shared among 50 users on the same subnet. Which protocol should be used for automatic printer discovery?

Correct answer: Bonjour/mDNS

Option D is correct because Bonjour (Apple's implementation of mDNS and DNS-SD) enables zero-configuration network printer discovery by allowing devices to advertise and find services on a local subnet without a dedicated DNS server, which is ideal for sharing a printer among many users. Option A, SMTP, is an email transmission protocol and has no role in printer discovery. Option B, IMAP, is an email retrieval protocol used to access mailboxes on a mail server, not for device or service discovery. Option C, SNTP, is the Simple Network Time Protocol used for clock synchronization across network devices, not for discovering printers.