CompTIA Security Plus Mock Test Q1012

Which of the following ports should be opened on a firewall to allow for NetBIOS communication? (Select TWO).

A. 110
B. 137
C. 139
D. 143
E. 161
F. 443


Correct Answer: B,C
Section: Cryptography

Explanation
NetBIOS provides four distinct services:
Name service for name registration and resolution (port: 137/udp)
Name service for name registration and resolution (port: 137/tcp)
Datagram distribution service for connectionless communication (port: 138/udp)
Session service for connection-oriented communication (port: 139/tcp)

Incorrect Answers:
A: POP3 uses port 110. NetBIOS does not use port 110.
D: IMAP uses port 143. NetBIOS does not use port 143.
E: SNM