In Virtualization What Is The Role Of The Hypervisor?
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In Virtualization What Is the Role of The Hypervisor?
Answer: In virtualization, the role is to assist the generation and the maintenance of the Virtual machines with an abstraction of the software from its physical device(hardware). The virtualization happens through a hypervisor with the interception of the request between the hardware and virtual resources.
In cloud computing hypervisor is the software which allows virtualization by assigning the resources to different parts of the hardware. A virtualization hypervisor is a program that is able to isolate, divide, and abstract. Hypervisors allow the multiple OS to work on a single host at a time. There are two types of the hypervisor available which are:
Type-1 hypervisor:
It is capable to run on the underlying host and is also referred to as the native hypervisor. There is no need for the base server operating system. It is directly connected to hardware resources. The pros and cons of type-1 hypervisor are:
Pros:
Due to the direct connection with the physical resource, it has greater efficiency. It has strong security as there is no third-party involvement and the hacker has nothing to attack or manipulate.
Cons:
It uses separate dedicated machines for proper working and provides guidelines to the VNs and handles the hardware resources of the host.
Type-2 hypervisor:
The host OS works on the underlying system of the host.it is called the hosted hypervisor, it has no direct connection with the hardware and runs the application in the physical machine of the host. The software exists in OS and the hypervisor calls the OS for hardware. The pros and cons of the type-2 hypervisor are:
Pros:
The type-2 hypervisor has fast and simple access to the guest OS along with the running host machines. They have an extra characteristic for the guest OS which increases the connection between the guest and host machine.
Cons:
The performance of this type is less than type-1 because it has no direct connection with the physical machines and there is also the risk of the threat because the attacker might find something for attack if access to the host OS is possible and have permission to the guest OS.