It is first important to explain what colo and rack space actually means. If somebody or a company wants a website, the first thing they must do to get started is think of and purchase a domain name. Once they have done this they need to organise hosting so that the website actually appears on the Web. The website needs to be hosted on another type of computer called a server. The company could choose to host the site on their own servers located in their offices, but the need to provide ancillary services such as cooling, high-bandwidth connectivity and 24/7 support staff usually make this less attractive. As an alternative, a managed server provider will rent the hardware, reliable data centre hosting and support services to the company, easing the administrative burden whilst maximising reliability. The company could also choose shared hosting