Which of the following well-known service ports/services do not have to be disabled, because they do not serve as a security risk if left open?
A.
Telnet.
B.
FTP.
C.
Both of the above.
D.
None of the above
Explanation:
Telnet and FTP ports that are open to the Internet serve as one of the bigger security risks to the company. All ports that are not being used should be disabled, especially unused Telnet and FTP ports.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 457-458.