To Prevent Man-In-The-Middle Attacks, Janet, a Network Administrator, Configures a GPO

Multiple Choice

To prevent man-in-the-middle attacks, Janet, a network administrator, configures a GPO such that all the traffic sent toward a specific database server is encrypted using IPSec. While most of her colleagues are able to successfully connect to the database via the IPSec authentication process, the connection is not successful for some computers. What do you see to be the problem here?

A) The IP addresses of the computers were not added under Endpoint 1.
B) The connection between the failed computers and the server was protected with IPSec.
C) The rule type was set to Isolation instead of Server-to-server.
D) The computers did not have an IPSec certificate.