Fundamentals of Communications and Networking, 3rd Edition

Network Access Controls

IEEE 802.1X is a standard that defines access control to the network. Network access control (NAC) can preauthorize which devices can gain access to the network. Through policy, network administrators can define prescreening conditions prior to authorizing a new device to access the network. Prescreening may include scanning for device type, OS level, patch level, proper antivirus/antimalware protection, and minimum workstation security standards.

NAC helps with uniform access control across wired or wireless networks. NAC defines authentication controls for any user or device trying to access a LAN or WLAN. NAC helps control access for mobile devices, unknown devices, and rogue computers. It can also control what types ...