Scenario: A Citrix Administrator is configuring RSA as a two-factor authentication solution, using
default settings on the NetScaler. While testing the configuration, the administrator notices that
users cannot log on.
The administrator should verify that traffic is allowed to flow over __________ through the firewall
to resolve this issue. (Choose the correct option to complete the sentence.)

A.
UDP port 1850

B.
TCP port 1812

C.
TCP port 1850

D.
UDP port 1812