Network Admission Control (NAC)

Network Admission Control (NAC) is a sponsored by Cisco, a number of vendors to participate in the program, its purpose is to prevent viruses and hackers, worms and other emerging technologies for enterprise security hazard.
With NAC, customers can allow only legitimate, trusted endpoint devices (such as Pc, server, PDA) access network, while other devices are not allowed access. In the initial stage, when the endpoint device into the network, NAC can help to implement Cisco router access. This decision can be formulated based on the information the endpoint device, such as equipment status of the current anti-virus and operating system patches.