What functionality does SKP provide to enhance security?

What functionality does SKP provide to enhance security?

A.
It supports Cisco’s TrustSec Implementation on virtual machines

B.
It supports secure communications between Cisco IronPort and cloud-based
email severs

C.
It supports Cisco’s TrustSec solution by transporting information over networks
that are unable to support SOT propagation

D.
It supports secure communications between Cisco IronPort and Microsoft
Exchange