In the Client Authentication Action Properties window (below), for the required Sign On Method
section, Manual is selected.

This means:

A.
If a connection matches the Rule Base the service is an authenticated service, the client is
signed on after a successful authentication.

B.
The user must initiate the Client Authentication Session to the gateway.

C.
If a connection using any service matches Rule Base, the client is authenticated.

D.
If authentication is successful, access is granted from the network that initiated the connection.

E.
The user must TELNET to the target server on port 259.

Explanation:
When you select the option “Manual” at the Client Authentication Action dialog box the users have
to connect to port 259 with telnet or connect to port 900 with HTTP using a web browser to make
the authentication process at the gateway. This process must be done manually and works for the
rest of the session.
Incorrect Answers:
A: The authentication must be manual.
C: The authentication must be manual.
D: the “Manual” option tell us about connecting to the gateway to authenticate our request, not
about what happen if its successful. Don’t loose the focus of the question.
E: You can also connect to port 900 by HTTP, the “must” in the question make’s it a wrong
answer.