The correct option is To connect a keyboard mouse and monitor to a physical server.

A KVM switch lets an administrator use one keyboard one mouse and one monitor to access and control multiple physical servers. This reduces the need for separate input devices at each rack and it simplifies direct console access for configuration troubleshooting and maintenance.

Many modern KVM units also provide IP based remote access so technicians can reach a server console remotely while the fundamental role remains to connect keyboard video and mouse to a server for local or remote console work.

Cloud VPN is incorrect because that term refers to an encrypted network tunnel service for connecting sites or users to cloud networks and it does not provide local console or input device switching.

A method for backing up data in cloud environments is incorrect because backup systems handle data protection and storage and they do not deal with connecting keyboards mice or monitors to physical servers.

Physical controls to prevent attackers from gaining hardware access to servers is incorrect because physical security measures such as locks cages or biometric readers protect hardware access but they do not provide the input output switching functionality that a KVM offers.

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