3.2 Virtualisation

Question 1

What is Virtualisation

Answer 1

Virtualisation describes the creation of a virtual version of a device, software or server.

Question 2

Storage Virtualisation

Answer 2

Combines multiple storage devices so that they appear to be just one device.

Question 3

Server Virtualisation

Answer 3

Allows one physical server to host multiple virtual machines, each running separately.

Question 4

Virtual Client (3)

Answer 4

• Full desktop environment where the processing happens remotely
• Users will be unable to work if network connectivity is lost.
• An increased load on the server might result in poor performance

Question 5

Virtualisation Benefits

Answer 5

• Cheaper long-term
  -Less physical devices
  -Less cables
  -Lower Power Consumption
• Higher performance at a lower cost
  -do more with less
  -Only if set up efficiently
• Programs can be tested in a secure environment before deployment
• Easier to recover because only the server will need fixing

Question 6

Virtualisation Drawbacks

Answer 6

• Users could face serious performance issues if not set up efficiently
• If a single system fails the impact will be greater
• Initial setup is complex
  -requires technical knowledge
  -may be costly
• Easier for hackers to take more information at once as the data is stored in the same place

Question 7

Cloud technology

Answer 7

• Storage that is accessed through a network.
• Primarily uses internet
• Example of a storage virtualisation as data can be stored across multiple physical devices.

Question 8

Private Cloud

Answer 8

• Have its own data centre that can be accessed by employees
• Businesses have control over data management and security
• High set up cost and maintenance

Question 9

Public Cloud

Answer 9

• Uses a third-party service provider like google to provide storage over the internet
• Pay to use service
• Data is maintained by the cloud provider and the business depends on them to provide access and security

Question 10

Hybrid Cloud

Answer 10

• Mix of on-site storage and third party services
• Organisations can move workloads between clouds as their needs change
• More flexibility of holding sensitive data in private or public cloud