What actions does the DHCP server take when there is an IP address conflict, as shown below?

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The DHCP server will automatically resolve all conflicts after their lease is over.

The IP addresses are removed from the DHCP pool until the conflicts are resolved.

The IP addresses detected by gratuitous Address Resolution Protocol are removed from the pool.

The IP addresses detected by ping are removed from the pool.

The DHCP server needs to be restarted in order to automatically clear all conflicts.