Traffic Handling Users of the server may be hampered by an excessive number of requests from a webpage or application. Your website may become very slow or even temporarily stop. Because this system has its own piece of server capacity that other users can not access, you will not be hampered by other websites or applications. The performance of your website will naturally become a little better and more reliable. The question of being hampered by other websites or applications do not arise at all.
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.
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.