A Rack Server Cabinet is a cabinet specifically designed to house and organize servers, networking equipment, and other IT hardware. It uses a standardized architecture, such as a 19-inch-wide rack, to efficiently manage and protect equipment. These cabinets are widely used in data centers and enterprise server rooms. The height of a Rack Server Cabinet is typically measured in "U" units (1U = 1.75 inches or 44.45 millimeters) and can accommodate different server sizes, such as 1U Rack Server, 2U, or 4U servers. This design not only saves space but also facilitates equipment maintenance and management.