What protocol is commonly used for sending and receiving emails?

Correct option is B

SMTP is primarily used for sending emails from client to server and between servers. For receiving emails, protocols like IMAP and POP3 are generally used.
Important Key Points:
1. Email Sending Protocol: SMTP is the standard for outgoing mail.
2. Inter-Server Communication: Also enables server-to-server email transfers.
3. Pairing with POP/IMAP: Works alongside protocols for receiving.
Knowledge Booster:
· SSH: Used for secure remote access.
· FTP: Manages file transfers, not emails.
· HTTP: Transfers web data, not email.