An administrator is creating an IPsec site-to-site VPN between his corporate office and branch office. Both offices are protected by Check Point Security Gateway managed by the same Security Management Server (SMS). While configuring the VPN community to specify the pre-shared secret, the administrator did not find a box to input the pre-shared secret.
Why does it not allow him to specify the pre-shared secret?
A . The Gateway is an SMB device
B . The checkbox “Use only Shared Secret for all external members” is not checked
C . Certificate based Authentication is the only authentication method available between two Security Gateway managed by the same SMS
D . Pre-shared secret is already configured in Global Properties
Answer: C