A rack server is a computer designed to fit into a standardized rack framework, typically 19 inches wide. They are modular, allowing multiple servers to share power, cooling, and cabling infrastructure. Rack. Server racks and cable management systems are the backbone of any organized IT environment, from small office server closets to enterprise data centers. Get it wrong. A data center rack is a standardized frame structure designed to securely house IT equipment such as servers, switches, storage systems, and power distribution units. Let's explore the essentials of server rack cabinets and why they are indispensable in IT setups in business.