Which of the following features belong to the Generic Routing Encapsulation (GRE)
tunneling protocol? Each correct answer represents a complete solution. Choose all that
apply.
A.
GRE provides explicit protection against recursive encapsulation.
B.
GRE tunnels are designed to be completely stateful.
C.
GRE provides implicit protection against recursive encapsulation.
D.
GRE supports multiprotocol tunneling.
E.
GRE is used for creating a virtual point-to-point link.
F.
GRE tunnels are designed to be completely stateless.
Answer: ADEF
GRE supports multiprotocol tunneling.
GRE provides explicit protection against recursive encapsulation.
Hardware support of GRE tunneling increases the performance of the router.
GRE keepalive messages allow the status of the end-to-end tunnel to be monitored.
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mob_ntwks/configuration/15-mt/mob_ntwks-15-mt-book/imo-gre-mbnet.html