Which two VPN solutions extend the routing capabilities of basic IPsec VPNs? (Choose two.)

A.
GRE

B.
NVI

C.
DES

D.
VTI

E.
AES

Explanation:
Generic Routing Encapsulation (GRE) is a tunneling protocol developed by Cisco Systems that encapsulates a wide variety of network layer protocols inside virtual
point-to-point links over an Internet Protocol internetwork.
Traffic Encryption with the IPsec Virtual Tunnel Interface. When an IPsec VTI is configured, encryption occurs in the tunnel. Traffic is encrypted when it is forwarded
to the tunnel interface. Traffic forwarding is handled by the IP routing table, and dynamic or static routing can be used to route traffic to the SVTI.