The connector models the physical interface to the display. The HDMI protocols use a query mechanism to receive data about the monitor resolution, and refresh rate by reading the extended display identification data (EDID) (see VESA Standard ) stored inside the monitor. This data can then be used to correctly set the CRTC mode. HDMI also supports hot-plug events to detect if a cable has been connected or disconnected as well as handling display power management signaling (DPMS) power modes.