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.
Amazon EC2 is a web service that provides secure, resizable compute capacity in the cloud. It is designed to make web-scale cloud computing easier for developers. You can use Amazon EC2 for a variety of applications, including websites and web applications, development and test environments, and even back-up and recovery scenarios. Amazon EC2 offers a wide selection of instance types with varying combinations of CPU, memory, storage, and networking capacity that you can use to meet the unique needs of your applications.

Virtual private server (VPS) hosting is a type of web hosting that uses software to emulate multiple servers on a single virtual host. Even though the websites are hosted on the same physical machine, VPS hosting allows each server to be entirely independent, treating them as if each site were on its own separate machine. One advantage of VPS is that it fits in well with other hosting plans. A virtual hosting plan gives clients another hosting option that fits between most shared hosting and dedicated hosting pans.
A virtual private server (VPS) is created through the process of virtualization, by which a virtual replica of a physical server is created. A VPS is like having access to your own personal server with an allocated number of resources and choice of a pre-installed operating system. It is an isolated microsystem based on a shared server. Since a VPS is self contained, you have full control of your server setup and are responsible for all updates and security. You can also choose to opt for our managed service.
Unmetered hosting is generally offered with no limit on the amount of data-transferred on a fixed bandwidth line. Usually, unmetered hosting is offered with 10 Mbit/s, 100 Mbit/s or 1000 Mbit/s (with some as high as 10Gbit/s). This means that the customer is theoretically able to use ~3 TB on 10 Mbit/s or up to ~300 TB on a 1000 Mbit/s line per month, although in practice the values will be significantly less. In a virtual private server, this will be shared bandwidth and a fair usage policy should be involved. Unlimited hosting is also commonly marketed but generally limited by acceptable usage policies and terms of service. Offers of unlimited disk space and bandwidth are always false due to cost, carrier capacities and technological boundaries.[3]
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