Which statement is true about an IPsec/GRE tunnel?
A.
The GRE tunnel source and destination addresses arespecified within the IPsec
transform set.
B.
An IPsec/GRE tunnel must use IPsec tunnel mode.
C.
GRE encapsulation occurs before the IPsec encryption process.
D.
Crypto map ACL is not needed to match which trafficwill be protected.