Which two statements about RFC 2827 are true? (Choose two.)

A.
RFC 2827 defines egress packet filtering to safeguard against IP spoofing.

B.
A corresponding practice is documented by the IEFT in BCP 38.

C.
RFC 2827 defines ingress packet filtering for the multihomed network.

D.
RFC 2827 defines ingress packet filtering to defeat DoS using IP spoofing.

E.
A corresponding practice is documented by the IEFT in BCP 84.