Which of the following ports does NOT normally need to be open for a mail server to operate? A. Port 110 B. Port 25 C. Port 119 D. Port 143
Correct Answer: C
Explanation:
Port 119 is normally used for the Network News Transfer Protocol. It is thus not need for a mail server, which would normally listen to ports 25 (SMTP), 110 (POP3) and 143 (IMAP). Source: STREBE, Matthew and PERKINS, Charles, Firewalls 24seven, Sybex 2000, Chapter 1: Understanding Firewalls.
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