Lesson 10 - Chapter 1: The Benefits of Virtualization

Question 1

What is virtualization?

Answer 1

running software that pretends to be a physical computer

Question 2

What’s one OS that you can’t run in a VM?

Answer 2

macOS because of Apple’s restrictions

Question 3

Virtualization is a huge benefit to who? With what?

Answer 3

(big) companies with huge data centers packed with servers (they save power, hardware costs, self manage systems, etc)

Question 4

What’s the concept behind hardware consolidation?

Answer 4

want to avoid letting expensive hardware sit idle (unused resources) and make sure we’re using everything to its max potential

Question 5

What’s an example of hardware consolidation?

Answer 5

You want to replace complex desktop PC with durable thin clients that only need enough power to access a server so hardware isn’t unused

Question 6

What’s the most popular reason for virtualizing?

Answer 6

Since VMs are files, they can be easily copied and distributed (to set up new employees easily)

Question 7

What’s a security benefit of using Virtual Machines?

Answer 7

The host system and any other VMs it runs are generally unaffected and uninfected from hacking, malware, etc

(just reload an alternate clean copy of the VM file)

Question 8

Can you take a snapshot on a VM?

Answer 8

Yes (great for risky maintenance, updates, etc)

Question 9

What’s the time limit for keeping snapshots?

Answer 9

Each snapshot may reduce performance and should be removed as soon as the possible danger has passed (not useful for long-term backup)

Question 10

What are 3 ways you can use VMs for urgent, critical research?

1. Test
2. See if
3. Confirming

Answer 10

1. Test new OS or application updates before updating the physical systems you manage
2. See if you can re-create the problem a user is reporting
3. Confirming an app works on all of the OS you need to install it on