In an ideal set up, there should be a fan located near the top of the cabinet configured to exhaust out air, and a fan located near the bottom to push in air. In this setup, cool air enters through the front of the switch, where the network ports are located, and exits from the rear, near the power supply units. Electronics such as. Network switches deployed in data centers often utilize side-to-side airflow cooling, which requires less vertical space and increases port density. After all, sealing these gaps (both within and along the sides of cabinets) often provides the greatest return on investment of any airflow management effort, both. Front-to-back airflow, or port side intake to power side exhaust, is among the most prevalent configurations.