Which of the following protocols receives messages from email servers? A. SMTP B. Both SMTP and POP C. HTTP D. POP

The correct answer is B. Both SMTP and POP.

SMTP (Simple Mail Transfer Protocol) is a standard protocol for electronic mail (email) transmission. SMTP is an application-layer protocol that is typically used to send emails from an email client to an email server. The SMTP protocol is defined by RFC 821 and RFC 2821.

POP (Post Office Protocol) is a standard protocol for accessing email from an email server. POP is a client-server protocol that is typically used

When you send an email, your email client uses the SMTP protocol to send the email to the recipient’s email server. The recipient’s email server then uses the POP protocol to deliver the email to the recipient’s email client.

Here is a brief explanation of each option:

• A. SMTP is a protocol for sending email. It is not used to receive email.
• B. Both SMTP and POP are used to send and receive email. SMTP is used to send email, and POP is used to receive email.
• C. HTTP is a protocol for accessing web pages. It is not used to send or receive email.
• D. POP is a protocol for receiving email. It is not used to send email.