VIRTUALISATION

VIRTUALISATION

1. types

   • full virtualisation
     • less secure
     • slow in operations
     • more portable and compatible
     • eg. microsoft and parallel systems
   • para virtualisation
     • more secure
     • faster than full virtualisation
     • less portable and compatible
     • eg. VMWare and Xen
   • hardware assisted virtualisation

2. ring layers

   • mechanisms to protect data and functionality from faults and malicious behavior.
   • types
     • ring 0
       • highest privelege(hypervisor)
     • ring 1
       • OS
     • ring 2
       • protection mode
     • ring 3
       • lowest privelege(Applications)