Odilon, an IT Administrator, Configures All Computers with a VPN

Multiple Choice

Odilon, an IT administrator, configures all computers with a VPN client to allow access to the remote access server while working from home. The VPN clients are configured to use the L2TP protocol with IPSec for authentication and data encryption. The authentication is based on the use of a pre-shared key.
Which of the following is true of this scenario?

A) This authentication method is more secure than using certificates or Kerberos.
B) All clients have the same password to access the remote access server.
C) The pre-shared key does not need to be configured on the remote access server.
D) The pre-shared key is more complicated to implement than certificates or Kerberos.