Which statement about TrustSec is true?
A. It monitors all the devices on the network, and turns them off when they are not needed.
B. It provides a policy-based, scalable platform that offers integrated posture, profiling, and guest services to make context-aware access control decisions.
C. It provides secure rich-media and collaboration services to optimize real-time voice and video applications.
D. It provides defense against denial of service attacks.