You have been using pre-shared keys for IKE authentication on your VPN. Your network has grown rapidly, and now you need to create VPNs with numerous IPsec peers. How can you enable scaling to numerous IPsec peers?

A.
Migrate to external CA-based digital certificates authentication

B.
Migrate to a load balancing server.

C.
Migrate to a shared license server.

D.
Migrate fromIPsec to SSL VPN client extended authentication