You are designing a multisite VPN solution for a customer and you are concerned with the
additional overhead of point-to-point tunnels and the associated overlay routing with DMVPN.
How does a GDOI-based VPN eliminate the additional tunnel and routing overhead found in
DMVPN?

A.
The GDOI-based VPN requires overlaying a secondary routing infrastructure through the
tunnels.

B.
In a GDOI-based VPN, all group members share a common security association.

C.
The GDOI-based VPN requires the provisioning of a complex connectivity mesh.

D.
The GDOI-based VPN leverages the routing protocol to find its peer for tunnel setup.