The choice you have to make between managed and unmanaged VPS hosting depends on several factors. Your skill in handling the server is an important factor. The efficiency in dealing with the complicated aspects of server hosting is necessary when you lack a manager to administrate the VPS hosting server. The strength of your business in terms of the profit is another important aspect. Considering all these factors, it is always advisable to seek higher opinion in your choice of a web hosting server.
If you want to customize your Web hosting server or need more technical flexibility than shared hosting, but the price tag of a dedicated server is prohibitive, then a VPS can be a brilliant option. You get full root-level access to install and delete software, set permissions, create accounts and determine your customized server environment – but because you are still sharing hardware you don't have to be concerned about the physical server maintenance and security.
Virtual means that the server runs in a virtualized environment, a cloud server rather than a physical server. This differentiates Virtual Private Servers from dedicated servers, which are physical machines in a data center rack. Virtual servers have the same functionality as a dedicated server and they look more or less the same from the client’s perspective, except that several virtual servers live on a single physical server.
The force driving server virtualization is similar to that which led to the development of time-sharing and multiprogramming in the past. Although the resources are still shared, as under the time-sharing model, virtualization provides a higher level of security, dependent on the type of virtualization used, as the individual virtual servers are mostly isolated from each other and may run their own full-fledged operating system which can be independently rebooted as a virtual instance.