802.1X network access control (NAC) enables administrators to provide uniform access control across wired and wireless networks. It is widely deployed on campus and branch enterprise networks, and is comprised of two major elements:
802.1X protocol—An IEEE standard for port-based network access control (PNAC) on wired and wireless access points. 802.1X defines authentication controls for any user or device trying to access a LAN or WLAN.
NAC—A proven networking concept that identifies users and devices by controlling access to the network. NAC controls access to enterprise resources using authorization and policy enforcement.
Problems 802.1X Network Access Control Address
The impact of wireless network access, mobility, bring your own device (BYOD), social media, and cloud computing on enterprise network resources is huge. This expanded mobility increases exposure to network threats and digital exploitation, as shown in the following figure. Using 802.1x helps you improve your ingress security in this type of environment while lowering your total cost of ownership.