A+ Question of the Week: TCP/IP Email Protocol

AplusQOW1Which of the following is not a port number associated with a TCP/IP email protocol?

A. 25
B. 110
C. 119
D. 143

The correct answer is C.

Port 119 is reserved for the Network News Transfer Protocol (NNTP). Port 25 is for SMTP, which is used in sending mail. Port 110 is for POP3, and Port 143 is for IMAP4, both of which are used in retrieving mail.

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