Cisco ASA 5500 Series VPN Session License (ASA-VPNS-50K) enables concurrent IPSec and SSL VPN tunnels on compatible ASA 5500 platform appliances. This license upgrade supports up to 50,000 simultaneous VPN sessions, essential for enterprises requiring large-scale remote access infrastructure. Compatible with ASA 5510, 5520, 5540, 5550, and 5580 models. Typical deployments include distributed branch office connectivity, enterprise remote workforce access, and secure site-to-site links. License is delivered as a software activation key and does not require hardware replacement. Tested and guaranteed; available via quote.