CompTIA Server+ SK0-005 Practice Question

In a hot-aisle/cold-aisle layout, chilled air is delivered from the computer-room air-conditioning (CRAC) units into the under-floor plenum and should emerge only in the cold aisles, where server fronts draw it directly into their intakes. Locating perforated tiles anywhere else-such as in hot aisles, evenly across the room, or just near CRAC returns-allows supply air to mix with warm exhaust or recirculate without passing through the equipment, creating bypass airflow, hot spots, and higher energy consumption. Therefore, vented tiles belong exclusively in the cold aisles immediately in front of the racks.