Systems Security Certified Practitioner – SSCP – Question1036

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.