Cloud computing and Client side virtualization( Comptia Objective 4.2)

Question 1

What is the difference between a Type 1 and Type 2 hypervisor?

Answer 1

• Type 1 aka Native or bare metal. Runs directly on the computers hardware and is faster than type 2 but requires a server( e.g VMware, vSphere, microsfot Hyper V window server)
• Type 2 aka Hosted. Runs within the operating system. Guest VMs are one step removed from hardware.( E.g VMware Workstation, VirtualBox, Hyper-V for Windows clients)

Question 2

What are your virtualization networking options?

Answer 2

• Bridged Networking gives VM( guest) direct access to Hosting computers network.
• Shared Network Address - The virtual machine shares the same IP address as the physical host. uses Network Address translation(NAT): Often the default this gives the guest access to an external network, but by using NAT the guest gets a separate IP on the private network.
• Host-only Networking: This creates a private virtual network for guests who can communicate with each other but not with the external network
• No Networking: This option disables networking for the VM altogether.

Question 3

Because VM network connections can be a security concern what should you do?

Answer 3

• You will need to monitor and disable them as necessary. And in some cases disable networking altogether.

Question 4

What is Host based virtualization?

Answer 4

• Your desktop plus others.

Question 5

What does a Hypervisor do?

Answer 5

• Software that manages all virtualization and keeps resources separate. Controls things such as RAM, storage, security, CPU etc for your virtual machines.
• Can be either hardware based( Type 1), or OS based( Type 2)
• Also known as the Virtual Machine Manager may require a CPU that supports virtualization.

Question 6

What CPU’s have built in Virtualization support?

Answer 6

• Intel CPUS that state “ VT” Or Virtualization Technology

- AMD CPUS that list AMD-V.

Question 7

More advanced Virtualization systems can even allow you to do what?

Answer 7

• Allow you to create virtual switches functionality and assign different virtual machines to different VLANS.

Question 8

What is the difference between virtualization and Emulation?

Answer 8

• Virtualization performs native Operating Systems processes. This is identical to a non virtual machine.
• Emulation essentially makes one machine behave like a completely different machine and will allow you to run software/os that the machine was not designed to run natively. A device is pretending to be another.
• Emulation is typically much slower than virtualization.

Question 9

What is an example of a Hypervisor security threat?

Answer 9

• VM escaping. Malware attempts to compromise the hypervisor and escape one server and gain access to data on another