What are the two tunneling technologies used to implement Layer 3 overlay VPNs over an IP backbone?

seenagape

9 years ago

What are the two tunneling technologies used to implement Layer 3 overlay VPNs over an IP
backbone?
(Choose two)

A.
IPSec

B.
GRE

C.
L2TP

D.
PPTP

E.
AToM

F.
MPLS TE