A server rack is a standardized frame or enclosure designed to hold multiple servers and other computing equipment. It provides a structured way to organize hardware, ensuring efficient use of space and proper airflow for cooling. Server racks are typically made of metal and come in various sizes, often measured in rack units (U), where one rack unit is 1.75 inches in height. These racks are essential in data centers, where numerous servers work together to manage data and applications. They often include features like cable management systems and power distribution units to streamline operations. Properly organized server racks help improve maintenance and accessibility for IT professionals.