Cisco ASA 5512-K9 delivers superior performance with up to 1 Gbps stateful inspection throughput, 250 IPsec VPN peers, 100,000 concurrent connections and 1 expansion slot makes it ideally suited for the small, mid-size enterprises or branch offices while delivering enterprise-strength security. ASA 5512-K9 needs Security PLus license to support Active/Active and Active/Standby.