Which of the following ports are commonly used to send/receive email? (Select TWO).

The correct answer is A. 25 D. 110. Port 25 (SMTP - Simple Mail Transfer Protocol) is used to send email between mail servers and from clients to servers. Port 110 (POP3 - Post Office Protocol v3) is used to receive/retrieve email from a mail server to a client. Port 53 is DNS (name resolution). Port 80 is HTTP…

Networking

Question

Options

A25
B53
C80
D110
E443

How the community answered

(39 responses)

A
92% (36)
B
5% (2)
E
3% (1)

Explanation

Port 25 (SMTP - Simple Mail Transfer Protocol) is used to send email between mail servers and from clients to servers. Port 110 (POP3 - Post Office Protocol v3) is used to receive/retrieve email from a mail server to a client. Port 53 is DNS (name resolution). Port 80 is HTTP (web browsing). Port 443 is HTTPS (secure web browsing). For email on the exam, remember: SMTP=25 (send), POP3=110 (receive), IMAP=143 (receive/sync), SMTP over TLS=587 or 465.

Topics

#SMTP#POP3#email protocols#port numbers

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