Server Virtualisation

Question 1

Describe full virtualisation.

Answer 1

Hypervisor simulates hardware to allow an unmodified guest OS to be run in isolation

Question 2

Describe paravirtualisation.

Answer 2

Virtual guests aware that they have been virtualised. Guest source codes are modified with capabilities to communicate to the hypervisor (via Hypercall, i.e. API calls to hypervisor).

Question 3

Describe OS-based virtualisation.

Answer 3

Lightweight “virtual machines (VMs)”, called containers, which are realised using features provided by a modern Linux kernel. VMs share the same OS, system binaries and libraries.

Question 4

What is a virtual machine (VM)?

Answer 4

A VM is defined as a representation of a physical machine by software that has its own set of virtual hardware upon which an operating system and applications can be loaded.

Question 5

Virtualisation is realised through…

Answer 5

Hypervisor!

Question 6

What is another name for hypervisor?

Answer 6

Virtual Machine Monitor.