The most important part of a site-to-site VPN deployment is the ________ .

A. Internet

B. Remote users

C. Encrypted VPN tunnel

D. VPN gateways

Explanation: Site to Site VPN

The basis of Site to Site VPN is the encrypted VPN tunnel. Two Security Gateways negotiate a link and create a VPN tunnel and each tunnel can contain more than one VPN connection. One Security Gateway can maintain more than one VPN tunnel at the same time.

Reference: https://sc1.checkpoint.com/documents/R76/CP_R76_Firewall_WebAdmin/92709.htm