  Traditional products working independently are no longer sufficient, since
threats are continually gaining in complexity, diversity and performance; In
order to proactively block such threats we need more integrated information
security solution. To achieve this objective, we will analyze a real-world
security platform, and focus on some key components Like, NAC, Firewall, and
IPS/IDS then study their interaction in the perspective to propose a new
security posture that coordinate and share security information between
different network security components, using a central policy server that will
be the NAC server or the PDP (the Policy Decision Point), playing an
orchestration role as a central point of control. Finally we will conclude with
potential research paths that will impact NAC technology evolution.
