A server rack is a standardized frame or enclosure designed to hold multiple servers and other computing equipment. These racks help organize hardware, optimize space, and improve airflow for cooling. They typically come in various sizes, measured in rack units (U), with one rack unit being 1.75 inches in height. Server racks are commonly used in data centers, where many servers operate together to manage data and applications. By using racks, organizations can efficiently store and maintain their IT infrastructure, ensuring that equipment is easily accessible for maintenance and upgrades while maximizing the use of available space.