Hello syed
Cisco 5500 Series Controllers:
The Cisco 5500 Series Wireless LAN Controller is currently available in one model: 5508. The 5508 controller supports up to 250 lightweight access points and 7000 wireless clients (or 5000 wireless clients and 2500 RFID tags when using the client location feature), making it ideal for large enterprises and high-density applications.
Cisco 4400 Series Controllers:
Because the Cisco 4400 Series Wireless LAN Controller supports 802.11a/b/g and the IEEE 802.11n draft 2.0 standard, organizations can deploy the solution that best meets their individual requirements. Organizations can offer robust coverage with 802.11 a/b/g or deliver greater performance with 5x the throughput and unprecedented reliability using 802.11n and Cisco's Next-Generation Wireless Solutions and Cisco Enterprise Wireless Mesh.
The Cisco 4400 Series Wireless LAN Controller is available in two models. The Cisco 4402 Wireless LAN Controller with two 1 GB Ethernet ports comes in configurations that support 12, 25, and 50 access points. The Cisco 4404 Wireless LAN Controller with four 1 GB Ethernet ports supports 100 access points. The Cisco 4402 controller provides one expansion slot. The Cisco 4404 controller provides two expansion slots that can be used to add VPN termination.
Cisco 2100 Series Controllers:
These controllers are part of a Payment Card Industry (PCI) certified architecture, and are well suited for retail customers who deploy transactional data applications such as scanners and kiosks. With performance up to 100 Mbps, the Cisco 2100 Series Wireless LAN Controllers also enable small and medium branch offices to deploy collaboration applications such as guest access and mobile voice.
