in order to prevent , or at least reduce , attacks on a computing device , such as denial of service attacks against a computer , or other attempts to compromise computing device security , when desired , presence of a person or properly configured response unit may be determined prior to fully - establishing a network connection between the computer device and a connecting device . while one goal is to allow determining a person is directing the actions of the connecting device before fully establishing the network connection , it will be appreciated that in certain circumstances it may be desirable to allow automated connection obtained by the response unit , such to allow diagnostics , backups , updates , etc . to be performed with the computing device .