IMAP serves which purpose?

• A. A protocol for sending email between servers.
• B. A method for encrypting email at rest.
• C. An application-layer protocol that allows an e-mail client to access e-mail on a remote mail server.
• D. A protocol for retrieving web pages.

Answer: (C)

IMAP stands for Internet Message Access Protocol and operates at the application layer to let an email client access and manage messages stored on a remote mail server. It lets you read, organize into folders, search, and keep messages on the server so changes are seen across devices. This is different from protocols that send mail or fetch web pages. It’s not used to send email (that’s SMTP), and it doesn’t specify encryption of stored mail (encryption is handled via TLS for transport or server-side storage). It also isn’t about retrieving web pages (that’s HTTP/HTTPS). The best description is that IMAP is an application-layer protocol enabling an email client to access email on a remote mail server.