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To help for security and reduce password vulnerability, the command _service password-encryption encrypts passwords so that they cannot be displayed in plain text in a printed version or backup copy of the configuration file. The command influences how IOS saves current and future password for console, vty, enable and username/password.

Set the switchport port-security to protect, so that MAC addresses are automatically stored.

Allow port security and use sticky secure MAC addresses.

Disable switchport port-security maximum, and use dynamic auto mode in the interface.

Disable port security and set the administrative mode of the interface into dynamic-auto.

Explanation

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