What functionality does SXP provide to enhance security?

A.
its supports Cisco’s TrustSec implementation on virtual machines

B.
it supports Cisco’s TrustSec solutions by transporting information over network that
are unable to support SGT propagation.

C.
it support secure communications between Cisco IronPort and cloud-based email
servers.

D.
it support secure communications between Cisco IronPort and Exchange.