The erosion of a defensible network perimeter in the face of changing work habits and data center technologies has reshaped security thinking. End-node centered security has taken on vast importance and both desktop- and server centric tools are a key part of defending the enterprise. Network security has evolved to address every network port as a defensible position. Identity, not location, is growing to be the unifying thread for all security tools, providing the common currency required for robust, policy driven access control at all levels. In other words the new center of enterprise IT security efforts is now everywhere - every server and desktop, every network access point, every application and service, every user is the now at the center.