How does a hosting provider provide services?

Question

Network administration

I have a purchased virtual hosting, where my site is spinning. I go to the external ip via SSH, drive in the login / password provided to me by the hoster and get to the bare OS, where only my user is logged in and where the web environment is deployed for me personally.
How does the hoster implement it technically? Under each user the virtual computer is created? With what is it done?
How, when accessing an external ip, does it transfer me to the desired virtual machine?

Answer 1

The hoster buys an autonomous system, routes to its equipment. On the equipment, it directs the IP pool to the server, the server divides it into virtual machines (see virtualization systems - OpenVZ, KVM, Xen, Hyper-V), in the config on the host machine, it sets up its own external IP for each virtual machine and installs an axis in the virtual machine.

Answer 2

Set up differently. Maybe chroot, for example, I use lshell, or maybe nothing special to configure. Lshell example . This is in the case of Wirth. hosting.
In your question, it is not clear how a bare OS can be with Wirth. hosting.