Final answer:
HDMI is the most common cable used for LCD monitors, providing high-definition video and audio through one cable, whereas DisplayPort is also a modern option for high-end displays.
Step-by-step explanation:
The most common cable used for liquid crystal display (LCD) monitors is HDMI (High-Definition Multimedia Interface). While VGA (Video Graphics Array) and DVI (Digital Visual Interface) were widely used in the past, HDMI has become the preferred choice due to its ability to transmit both high-definition video and audio through a single cable. The DisplayPort connector is another modern alternative that supports high resolutions and audio, and it is commonly used in high-end monitors and PCs for its ability to daisy-chain multiple displays.