Most major web hosting providers have their own private data centers, in which all of their web servers are stored. Data Centers are specially designed to accommodate the environmental needs of a web server. The temperature, humidity, dust content, lighting, cleanliness and security of the datacenter is meticulously upheld by on site staff that is responsible for keeping all of the web servers in perfect condition. The floors are air-cooled, all rooms are equipped with state-of-the-art fire extinguishing systems, and there is a 24 hour maintenance staff on duty 7 days out of every week.