Which three statements about the IPsec protocol are true? (Choose 3)

A.
IPsec is a framework of open standards.

B.
IPsec is bound to specific encryption algorithms, such as 3DES and AES.

C.
IPsec ensures data integrity by using checksums.

D.
IPsec authenticates users and devices that can carry out communication independently.

E.
IPsec is implemented at Layer 4 of the OSI model.

F.
IPsec uses digital certificates to guarantee confidentiality.