A Cisco ASA 5505 activation key is a unique code that enables the full functionality of the device. When you purchase a Cisco ASA 5505, it comes with a base license that allows you to use some of its features. However, to access advanced features such as VPN, intrusion prevention, and content filtering, you need to activate the device using a valid activation key.
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No reboot is required. The key activates immediately, though some features (like more VLANs) require a write memory and interface configuration changes. A Cisco ASA 5505 activation key is a