Ch. 9 section 4.3, 4.4, 4.5 Virtual Network Devices

Virtual Desktops

(also known as a virtual desktop interface [VDI]) strategies include: 1) Making multiple desktops available on the same local workstation host. ---------This implementation is very useful when you are testing an application on multiple platforms. 2) Implementing multiple desktops on one physical server host and allowing all end users to access those virtual desktops remotely. 3)All of the user desktops are provided as virtual machines from one hypervisor. 4) The user desktops can be low-end workstations that connect remotely to the hypervisor and run the desktop.

Virtual Routing

- must to support VRF (Virtual Routing Forwarding) -allows routers to support multiple networks on the same physical network at the same time

When you configure a virtual network interface within a virtual machine's configuration, you can specify:

1) The type of physical network interface to emulate 2) Mac Address 3) Network you want to connect to 4) Which virtual network you want to connect to

Moving virtual machines between hypervisors is what virtualization feature

Flexibility

NIC teaming in VM

allows you to have a couple of adapters in the first operating system and connect them for additional bandwidth or fault tolerance

Virtual Firewall

implemented vis software on the hypervisor to monitor and filter traffic on the virtual network as it flows between virtual machines

What is DHCP Guard for VMs

prevents the VM from being used as a rogue DHCP server

What is a router guard for the VM

prevents the VM from being used as a rouge router also creates a protected network - meaning if the network node fails, the machine would have another node take over in the cluster

Configure MAC address (parameter)

some hypervisor will allow you to manually assign

T or F virtual VLANS are compatible with physical VLAN hardware

True

Purpose of internal switch on a virtual network device

Virtual machines can talk between themselves and the hosts and cannot go out to the network

Settings and Features

-VLANs vlan identification -bandwidth management -Hardware accerleration ----Advanced -DHCP Gaurd -Router Guard -Port mirroring -NIC teaming

Lab scenario To allow the virtual machines to communicate with the Microsoft update servers on the internet,:

1) Create a new virtual switch configured for bridged (external) networking. 2) Connect the virtual network interfaces in the virtual machines to the virtual switch.

Virtual Networks

1) allow virtual servers and desktops to communicate with each other. Using the host operating system, virtual networks can allow communication to network devices out on the physical network. The following are possible components of virtual networks: 1) Virtual switches allow multiple virtual servers and desktops to communicate on virtual network segments and the physical network. -----Virtual switches are often configured in the hypervisor. 2) Virtual network adapters are created and assigned to a desktop or server in the hypervisor. ----Multiple network adapters can be assigned to a single virtual machine -----Each network adapter has its own MAC address. -------Each network adapter is configured to connect to only one network at a time (a virtual network or the physical network, but not both).

Scenario of lab :To allow the virtual machines to communicate with each other while isolating them from the production network: 2

1) create a new virtual switch configured for host-only internal networking 2) connect the virtual network interfaces in the virtual machines to the virtual switch

The 4 advantages and features of virtualization

Flexibility Testing Server Consolidation Isolation

Network as a Service (NaaS)

Like an offsite virtual network, all NaaS servers and desktops are virtualized and managed by a contracted third party. NaaS virtualizes the entire network infrastructure. -----No physical wiring is needed because the network infrastructure is virtual and the network is run at the service provider's site. A basic network is implemented on the contracted site in order to get out to the service provider's site. Typically, all network administration tasks are handled by the service provider.

An example of Port Mirroring in VM

TCP dump or wireshark

Verifying that security controls are working as designed is what virtualization feature

Testing

Offsite Virtual Networks

Offsite virtual networks allow you to move business-critical networking and other IT-related components to another physical location . This implementation requires minimal hardware at the physical site. Examples of offsite virtual networks include: 1) An offsite datacenter, where a contracted vendor manages the hardware and software to provide the virtual network that is accessed by the end users 2) A virtual PBX, where a virtual phone system handles call routing, voicemail, and conference calling. ------A PBX is typically implemented as dedicated hardware within an organization and can be quite expensive. ------A virtual PBX takes calls internally at the service provider's site and routes them to the correct employee on the contracted site.

Virtual routing vs physical routing

Physical routers can only support one network to one physical device at a time

Isolating a virtual machine from the physical network is what virtualization feature ?

Sandboxing

Performing a physical to virtual migration pv2 is what virtualization feature

Server consolidation

Define network connection (parameter)

There are four virtual network interface you have to configure within a virtual machine

Virtual switches support VLANS differntly in which ways

VLAN membership is defined within the configuration of each individual network interface instead of being connected to a host by UTP cable

Virtual routers and virtualized internetwork

Virtual routers share their routing tables through a routing protocol to route data between networks

Configure Virtual Network devices

Virtual switch manager Should exist before you create virtual machine create private switch (allows switches to only talk to only inside switches & not on the network) connect virtual network cards to virtual machines to a virtual switch

Virtual Switch

allows 1 virtual machine to communicate with a physical switch -implemented as ---software that is integrated within the hypervisor itself ----within the firmware of the hypervisor server hardware itself Floods each frame to learn its routing table( similar to physical switch)

Configure adapter emulation (parameter)

define the type of physicals interface that you want the virtual network interface to emulate

Purpose of external switch on a virtual network device

lets virtual machines use the host's network card directly. one network adapter for both the virtual machine and host If it was a server, two network cards should be used for one virtual machine and one host

Bandwidth management for virtual machine

makes it so the virtual machine cannot take over the network card's bandwidth

Virtual Servers

multiple instances of a server operating system are run on a single physical computer. You can migrate servers on older hardware to newer computers or add virtual servers to computers with extra unused hardware resources.

Port Mirroring in VM

sends a copy of network traffic to another machine if your using it as monitoring

What is Mac address spoofing for VMs

supports network load balancing