Select two statements that correctly describe the ESP protocol (Choose 2)

A.
ESP can operate in either tunnel or transport mode

B.
The following fields can be found in the ESP header, Security Parameters Index (SPI), Sequence number, crypto engine connection ID.

C.
The complete ESP header is encrypted

D.
ESP uses IP protocol 50

E.
ESP can provide data confidentiality service, but it does not provide data origin authentication.To achieve data origin authentication, AH must be used.