External virtual networks.Use this type when you want to provide virtual machines with access to a physical network to communicate with externally located servers and clients. This type of virtual network also allows virtual machines on the same virtualizationserver to communicate with each other. This type of network may also be available for use by the management operating system, depending on how you configure the networking. (The management operating system runs the Hyper-Vrole.) For more information, see "A closer look at external virtual networks" later in this topic.NoteHyper-Vdoes not support wireless networks. An external virtual network provides access to a physical network through a wired physical network adapter.Internal virtual networks.Use this type when you want to allow communication between virtual machines on the same virtualizationserver and between virtual machines and the management operating system. This type of virtual network is commonly used to build a test environment in which you need to connect to the virtual machines from the management operating system. An internal virtual network is not bound to a physical network adapter. As a result, an internal virtual network is isolated from all external network traffic.Private virtual networks. Use this type when you want to allow communication only between virtual machines on the same virtualizationserver. A private virtual network is not bound to a physical network adapter. A private virtual network is isolated from all external network traffic on the virtualizationserver, as well any network traffic between the management operating system and the external network. This type of network is useful when you need to create an isolated networking environment, such as an isolated test domain.
NETWORK LAYER
Virtual server hardware is used to facilitate in the creation of virtual machines. Virtual machines execute programs like physical machines.
Appeal Virtual Machines was created in 1998.
yes.... in mainframe we can do it using link agregattion for the virtual Linux machines.
HP Integrity Virtual Machines was created in 2005.
VPN (virtual private network)
The main advantage is that,the virtual machines reduces the hardware usage. In virtual machines we can load different OS.
A distributed computing system requires each machine attached to the network to has specific software allowing them to talk to each other. A distributed virtual systems allows the machines on a network to talk to each other without the use of central software.
A virtual network requires virtual network software in order to run. An example of such software is VirtualBox, although there are many suitable alternatives as well.
Virtual machines are divided into two major classifications, based on their use and degree of correspondence to any real machine. They are either a system virtual machine or a process virtual machine.
VM servers are virtual servers. They are used to allow remote access to virtual machines. They can run virtual machines created by other VM products.