Fill in the blank: A _______ is used by a VPN gateway to send traffic as if it were a physical interface.

A.
VPN Tunnel Interface

B.
VPN community

C.
VPN router

D.
VPN interface

Explanation:
Route Based VPN
VPN traffic is routed according to the routing settings (static or dynamic) of the Security Gateway operating
system. The Security Gateway uses a VTI (VPN Tunnel Interface) to send the VPN traffic as if it were a
physical interface. The VTIs of Security Gateways in a VPN community connect and can support dynamic
routing protocols.
http://sc1.checkpoint.com/documents/R77/CP_R77_VPN_AdminGuide/13868.htm