It's a unique number assigned to the VPS. It's a permanent identifier (dedicated) assigned to a device.
Of course! We give you scalability. If you need more power just contact us!
KVM is great for running very big instances, very secure and capable of running (almost) any operating system.
OpenVZ is nice for small, flexible and Linux based VMs.
It's a processing unit of a physical CPU assigned to a VM (virtual machine)
More vCpu you get, more power you get!