An organization recently installed a firewall on the network. Employees must be able to send and receive email from a POP3 server. In which of the following ways should the firewall be configured? (Select TWO).
A.
Allow TCP port 23
B.
Allow TCP port 25
C.
Allow TCP port 110
D.
Allow UDP port 25
E.
Allow UDP port 110
They are used for your e-mail.
SMTP which transfers mail between two systems uses port 25.
POP3, which most people use to deliver their mail from the server to their local computer, uses port 110.
Reference:
http://en.wikipedia.org/wiki/SMTP
http://en.wikipedia.org/wiki/Post_Office_Protocol
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