Unit 1 - LO3 Understanding Business IT Systems

Question 1

Virtualisation

Answer 1

To create a simulated or virtual network, computer or server using software.

Question 2

Server virtualisation

Answer 2

. Patitioning of physical servers into multiple virtual servers
. This makes each of the virtual servers look and act like a physical server to the end user
+ Reduces operating costs
+ Increases productivity, efficiency and responsiveness
- Training required for the technical staff
- Complex system problems can be harder to analyse

Question 3

Storage virtualisation

Answer 3

. Separates the physical storage from the logical storage server
+ Reduces the amount of physical storage needed
+ Simplifies and reduces the time required for backup, recovery and general storage activities
- Can be difficult to solve problems when something goes wrong

Question 4

Client virtualisation

Answer 4

. The OS is managed centrally on a server and executed locally on a client device
+ Machines can be standardised
+ Easier to backup and secure
- Availability and performance depend on network.internet connection
- Multiple monitor connections may not be possible with some solutions, or could be limited

Question 5

Hybrid

Answer 5

. Combinations of paravirtualisation and hardware-assisted virtualisation
+ Improves the reliability of virtual machines
+ Improves performance and efficiency
- Training required to implement and manage the environment
- Bandwidth issues