Before Gateways can exchange encryption keys and build VPN tunnels, they first need to authenticate to each other using one of the following credentials:

Before Gateways can exchange encryption keys and build VPN tunnels, they first need to authenticate to each other using one of the following credentials:

A.
Certificates, SIC

B.
Pre-shared secret,Internal CA

C.
Pre-shared secret, SIC

D.
Certificates, Pre-shared secret

E.
Certificates, SVN