Virtual Network Concepts

Virtualization

• Virtualization takes advantage of these under-utilized and unused resources.

• One of main advantages of using virtualization is its ability of support multiple server, desktop and other operating systems in a single physical hardware platform. It does this by the use of a hypervisor.

Hypervisor

• The hypervisor creates the virtualize environment to create virtual machines by virtualizing the physical components of a computer.

• The guest operating systems won’t be able to tell the difference in the hardware (AMD vs Intel processor), this is one of the main benefits of the hypervisor.

• It emulates the hardware and other components making the guest operating system function as though it’s currently in its native operating environment.

• Virtual Network Adapter allows a guest operating system to connect to other guest machines and/or the physical network.

• Virtual Networking allows virtual machines to interconnected with each other, the host machine and even the physical network.

Type 1 Hypervisor

• The Type 1 hypervisor is sometimes referred as a bare-metal hypervisor.

• This type of deployment is installed directly on the hardware rather than on top of a host operating system.

• The bare-metal or Type 1 hypervisor has direct access to all the hardware resources.

Type 2 Hypervisor

• The Type 2 hypervisor is an application which is runs on top of an existing host operating system such as Microsoft Windows, Apple Mac OS X or Linux. 

• This deployment does not allow the hypervisor application to interact directly with the hardware resources such as the processor, RAM, etc.

Network Function Virtualization (NFV)

• NFV allows IT professionals to deploy virtual networking and security devices within a hypervisor on their private cloud or the public cloud.

• Allows multiple virtual networking devices to be running on a single server within a virtualize environment.