Fred is planning on using the windows socket application ClientApp.exe program to create a
client-side application that his employees will use. This program will access backend programs
from two different remote sites over WAN connections. If Fred does not make any modifications to
the ClientApp.exe default settings, what port must he have the network engineer open in order for
the application to communicate?
A.
21
B.
23
C.
25
D.
80
Explanation: