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.
Network Admission Control (NAC) to ensure the system meets the access network to wait a certain level of safety standards. It will detect an updated version of virus protection software, currently available patches, browser settings, restrict, and effective personal firewall. Network Admission Control will first test whether the system meets the above requirements, before deciding whether to grant the access network.