virtualisation

Question 1

what is virtualisation?

Answer 1

visualisation is the creation of multiple virtual machines/servers from a physical machine achieved using a bare metal hypervisor

adv- you can run many devices with one device, greater efficiency in power consumption and physical space and resources as everything is setup by a single device, additionally you can re allocate resources such as RAM, space to the guest machines this means re-utilising the most of the existing devices

disvd- as the VM software’s are outsourced by 3rd party firms data may not be secure

Question 2

server virtualisation

Answer 2

It enables a single physical server to run several applications and each appears to have its own server , now you can run any other types of servers such as a print server, web server, file server etc

Question 3

client virtualisation

Answer 3

The machines can be standardised e.g everyone has the same applications,look and feel and used across a large variety of different hardware configurations. its compatible with other hardware

adv- easier to backup,deploy,manage can be done centrally via the server
more reliable and long lasting
minimal maintenance and therefore lower costs

disvd- performance and availability if fully dependant on network/internet connection
the central server needs to handle all that extra bandwidth
good high spec servers, more expensive
expertise is needed to install the clients require training

Question 4

storage visualisation

Answer 4

Used for data management, groups multiple physical storages from multiple sources (storage devices) into a single storage

adv- reduces the amounts of physical storage required
simplifies and reduces the time required for backup, recovery and general storage activities

disvd- can be difficult to solve problems when something goes wrong

Question 5

cloud virtualisation

Answer 5

Cloud Virtualisation is where businesses pay a Cloud service provider to host and run virtualisation technologies for their business.

adv-quick to set up, pay as you go, its scalable

disvd-: security risks as its outsourced by 3rd party firms so data may not be secure, bandwidth issues (need reliable network)

Question 6

hybrid virtualisation

Answer 6

combination of PV and hybrid assisted V

adv- produce superior performance on the guest without having the guest to be completely paravirtualized

• improves reliability of VMs
• improved performance and efficiency
• combines adv of PV and hybrid assisted virt.

disvd- upfront costs
-training required to implement and manag