Introduction to a virtual network

A virtual network is a software-defined network where all links and components may or may not have direct interaction with physical hardware. In most cases, direct interaction with physical hardware is made by the hypervisor or the host controller. All links between virtual machines, virtual switches, virtual bridges, and virtual network interfaces are made completely virtually. The following are the two types of network virtualization:

• External network virtualization: This consists of several local networks operating as one virtual network. Physical LANs could be in the same location or spread over multiple locations. Usually, external virtualization is a cloud network service-based model that multiple companies can use to connect their multisite virtual environment for a service fee. External network virtualization can be easily achieved by combining several internal virtual networks into a single virtualized network using a WAN or the Internet.
• Internal...