You can use Amazon VPC to host multi-tier web applications and strictly enforce access and security restrictions between your webservers, application servers, and databases. You can launch webservers in a publicly accessible subnet and application servers and databases in non-publically accessible subnets. The application servers and databases can’t be directly accessed from the Internet, but they can still access the Internet via a NAT gateway to download patches, for example. You can control access between the servers and subnets using inbound and outbound packet filtering provided by network access control lists and security groups. To create a VPC that supports this use case, you can select "VPC with Public and Private Subnets" in the Amazon VPC console wizard.
The main reason that someone signs up for a VPS is that they need a server through which to run their site. When you adopt one, you should notice that your site is performing better than it was on a shared account (because of the guaranteed allotment of resources). Also, the full root access gives you better control. You are able to install and get rid of whatever programs you want.
KnownHost has a blog, wiki and forums which have fresh topics that are interesting and relevant, plus informative answers to thousands of common questions. You can also give our server admin, support team and sales staff a shout anytime you have questions or concerns and we'll be happy to answer your questions, recommend VPS (or other) solutions and help you make the most out of your VPS hosting plan(s).
Which VPS hosting plan to choose between a managed VPS and unmanaged VPS? Generally speaking, unmanaged VPS hosting is less expensive than managed VPS hosting when you compare plans that have the same allocated resources. One of the main reason is that your hosting provider offers less support on unmanaged VPS, thus they charge less for the service. If you are well-versed in VPS hosting and you have a lot of time planed for the VPS server, you can go for a unmanaged VPS. Otherwise, you should get a managed VPS. Some of the tech issues you may need to know if you choose unmanaged VPS include but not limited to: VPS security, software update and patching, LAMP server configuration (linux, apache, mysq, php), DNS configuration, control panel setup, SSL certificates creation, website setup, server backup, etc.
A VPS runs its own copy of an operating system (OS), and customers may have superuser-level access to that operating system instance, so they can install almost any software that runs on that OS. For many purposes they are functionally equivalent to a dedicated physical server, and being software-defined, are able to be much more easily created and configured. They are priced much lower than an equivalent physical server. However, as they share the underlying physical hardware with other VPSes, performance may be lower, depending on the workload of any other executing virtual machines.