Type 1 Hypervisor:

• This is ALSO known as Bare METAL or Embedded or Native Hypervisor.
• It works directly on the hardware of the host and can monitor operating systems that run above the hypervisor.
• It is completely independent from the Operating System.
• The hypervisor is small as its main task is sharing and managing hardware resources between DIFFERENT operating systems.
• A major ADVANTAGE is that any problems in one virtual machine or guest operating system do not AFFECT the other guest operating systems running on the hypervisor.
• Examples: VMware ESXi Server, Microsoft Hyper-V, Citrix/Xen Server

Type 2 Hypervisor :

• This is also known as Hosted Hypervisor.
• In this case, the hypervisor is installed on an operating system and then supports other operating systems above it.
• It is completely dependent on host Operating System for its operations
• While having a base operating system allows better specification of policies, any problems in the base operating system a ffects the entire system as well even if the hypervisor running above the base OS is secure.
• Examples: VMware Workstation, Microsoft Virtual PC, Oracle Virtual Box

Type 1 Hypervisor:

Type 2 Hypervisor :