Cisco 5520 Series Wireless LAN Controller is a highly scalable, service-rich, resilient, and flexible platform that is ideal for medium-sized to large enterprise and campus deployments. AIR-CT5520-K9 can interoperable with other Cisco controllers and support Up to 1500 access points and 20000 clients with licenses.

• AIR-CT5520-K9 Specification

• AIR-CT5520-K9 Specifications
  Devide Tyde	Wireless controller
  Ports	Dual 1-Gb or 10-Gb ports with Link Aggregation Group
  Console ports	10/100/1000 RJ-45
  Wireless standards	802.11a/b/g/d/e/h/k/n/r/u/w/ac
  License	● 5 AP licese: L-LIC-CT5520-5A  ● 25 AP licese: L-LIC-CT5520-25A  ● 50 AP licese: L-LIC-CT5520-50A  ● 100 AP licese: L-LIC-CT5520-100A  ● 250 AP licese: L-LIC-CT5520-250A  ● DTLS License: L-LIC-CT5520-DTLS-K9
  Security standards	●  Wi-Fi Protected Access (WPA) ●  IEEE 802.11i (WPA2, RSN) ●  RFC 1321 MD5 Message-Digest Algorithm ●  RFC 1851 The ESP Triple DES Transform ●  RFC 2104 HMAC: Keyed Hashing for Message Authentication ●  RFC 2246 TLS Protocol Version 1.0 ●  RFC 2401 Security Architecture for the Internet Protocol ●  RFC 2403 HMAC-MD5-96 within ESP and AH ●  RFC 2404 HMAC-SHA-1-96 within ESP and AH ●  RFC 2405 ESP DES-CBC Cipher Algorithm with Explicit IV ●  RFC 2406 IP Encapsulating Security Payload (ESP) ●  RFC 2407 Interpretation for ISAKMP ●  RFC 2408 ISAKMP ●  RFC 2409 IKE ●  RFC 2451 ESP CBC-Mode Cipher Algorithms ●  RFC 3280 Internet X.509 PKI Certificate and CRL Profile ●  RFC 3602 The AES-CBC Cipher Algorithm and Its Use with IPsec ●  RFC 3686 Using AES Counter Mode with IPsec ESP ●  RFC 4347 Datagram Transport Layer Security ●  RFC 4346 TLS Protocol Version 1.1
  Encryption	●  WEP and Temporal Key Integrity Protocol-Message Integrity Check (TKIP-MIC): RC4 40, 104 and 128 bits (both static and shared keys) ●  Advanced Encryption Standard (AES): CBC, CCM, Counter Mode with Cipher Block Chaining Message Authentication Code Protocol (CCMP) ●  DES: DES-CBC, 3DES ●  Secure Sockets Layer (SSL) and Transport Layer Security (TLS): RC4 128-bit and RSA 1024- and 2048-bit ●  DTLS: AES-CBC ●  IPSec: DES-CBC, 3DES, AES-CBC
  Authentication, Authorization, and Accounting (AAA)	●  IEEE 802.1X ●  RFC 2548 Microsoft Vendor-Specific RADIUS Attributes ●  RFC 2716 PPP EAP-TLS ●  RFC 2865 RADIUS Authentication ●  RFC 2866 RADIUS Accounting ●  RFC 2867 RADIUS Tunnel Accounting ●  RFC 3576 Dynamic Authorization Extensions to RADIUS ●  RFC 3579 RADIUS Support for EAP ●  RFC 3580 IEEE 802.1X RADIUS Guidelines ●  RFC 3748 Extensible Authentication Protocol ●  Web-based authentication ●  TACACS support for management users