Users are guaranteed the resources on their VPS web hosting account. This means that your account will always be allocated the set amount of RAM, CPU, and Disk Space you’ve chosen regardless of what other users on the server are doing. This allows for greater stability and performance of your website. You also do not share the Operating System with any other users, providing better security for your website files.
Cloud hosting: This type of hosting is slightly more expensive than shared hosting (similarly priced to VPS hosting). Rather than using a single server to store and load your site, a cloud system distributes resources across many different computers for faster response times. However, this model typically doesn’t give you root access, and its distributed structure presents fundamental security challenges.
It can varies a lot from VPS hosts to hosts. This can be a little confusing because unfortunately many hosting providers differ in their definition of “managed hosting”, and some providers have “semi-managed hosting”. So if you’ve determined that you need a managed VPS (which is positively the way to go if you are not comfortable with running a Linux server), you must contact your potential VPS service providers for the details or look at the specific tasks that your managed provider will and will not perform.
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.