Cisco Wireless LAN Controllers are responsible for system wide wireless LAN functions, such as security policies, intrusion prevention, RF management, quality of service (QoS), and mobility. They work in conjunction with Cisco Access Points and the Cisco Wireless Control System (WCS) to support business-critical wireless applications. From voice and data services to location tracking, Cisco Wireless LAN Controllers provide the control, scalability, security, and reliability that network managers need to build secure, enterprise-scale wireless networks-from branch offices to main campuses.
The Cisco 4400 Series Wireless LAN Controllers are designed for medium-to-large enterprise facilities. The Cisco 4404 with four Gigabit Ethernet ports supports up to 100 lightweight access points and provides two expansion slots that can be used to add enhanced functionality, such as VPN termination and other capabilities, in the future.