Description: 'System' means the switch will send information when the following system events occur: system boots up, system shuts down, system accounting is enabled, and system accounting is disabled. 'Exec' means the switch will send information when an administrator logs in and logs out via the console port, telnet or SSH. 'Dot1x' means the switch will send information when an IEEE 802.1x client begins a session (authenticates via the switch), ends a session as well as interim updates of a session. 'Commands' means the switch to send information when commands of specified privilege level and higher are executed on the switch.