MACSec Key-Based Licensing

In this section:

1. How MACsec Works
   MACsec capabilities prevent Layer 2 security threats, such as passive wiretapping, denial of service, intrusion, man-in-the-middle, and playback attacks.
2. MACsec licensing
   Devices that support MACsec functionality can be enabled for MACsec by purchasing a MACsec license.