Your company has a Microsoft Hyper-V Server 2008 R2 environment. You manage the virtual environment by using Microsoft System Center Virtual Machine Manager (VMM) 2008 R2. You are creating a virtual…

Question

Options

• APrivate
• BInternal
• CExternal
• DDedicated host

• A
  81% (13)
• B
  13% (2)
• D
  6% (1)

Explanation

Types of virtual networks While Hyper-V allows you to configure complex virtual network environments, the basic concept of virtual networking is straightforward. A virtual network works like a physical network switch except that the switch is implemented in software (which is why it is sometimes referred to as a virtual network switch). Ports are added or removed as they are needed when virtual machines are connected to or disconnected from a virtual network. Virtual Network Manager (available from the Hyper-V Manager snap-in) offers three types of virtual networks that you can use to define various networking topologies for virtual machines and the virtualization server. You can create the following types of virtual networks: Private virtual networks. Use this type when you want to allow communication only between virtual machines on the same virtualization server. 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 virtualization server, 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. A closer look at external virtual networks For a simple virtual network configuration that establishes connectivity to an external network, we recommend that you have at least two network adapters on the server running Hyper-V: one network adapter dedicated to the management operating system so you can access it remotely, and one or more network adapters dedicated to the virtual machines. If you are running an Internet SCSI (iSCSI) initiator for virtual hard disk storage, we recommend that you use additional network adapters in the management operating system. When you add the Hyper-V role during a full installation of Windows Server2008 or Windows Server2008R2, you have the option to configure one or more external virtual networks. However, this option is not available when you install Hyper-V on a Server Core installation. When you create an external virtual network, this action affects how networking is configured in the management operating system. Hyper-V creates a virtual network adapter in the management operating system. Hyper-V then binds the standard services and protocols to the virtual network adapter instead of the physical network adapter, and binds only the Virtual Network Service Protocol to the physical network adapter. After an external virtual network is configured, all networking traffic is routed though the virtual The virtual network switch functions as a physical switch would and routes networking traffic through the virtual network to its destination. For this reason, we recommend using at least one additional physical network adapter for managing network traffic. 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 virtualization server 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-V role.) For more information, see "A closer look at external virtual networks" later in this Internal virtual networks Use this type when you want to allow communication between virtual machines on the same virtualization server 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.

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