Which two statements about GRE tunnels are true? (Choose two.)

Which two statements about GRE tunnels are true? (Choose two.)

Which two statements about GRE tunnels are true? (Choose two.)

A.
GRE can be used to tunnel non-IP protocols, such as IPX.

B.
GRE can provide encrypted communication.

C.
GRE adds overhead of 16 bytes per packet.

D.
GRE can be used to tunnel IPv6 traffic.

Explanation:
GRE Tunnels for Non-IP Protocol Transport
Providers can deploy GRE to support the transport of non-IP protocols over third-party private IP infrastructure or even over the public Internet.

Tunneling IPv6 over IPv4
Using either GRE or IP-IP tunneled across an IP network, providers can tunnel IPv6 packets over IPv4 infrastructure, providing a migration path to IPv6 as defined in RFC 2893.



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