Module Server Administration and Networks

Get Started with Linux

In this module I will learn how to administrate servers and networks with Linux. Here you will find several tasks about the topic.

Write a definition for virtualization.

Virtualization allows multiple resources or environments to be configured on a single hardware system. The different environments and resources can be referred to as virtual machines, which act independently of each other. Therefore you need a hypervisor. The hypervisor is software that manages the various VM containers. It divides the machine resources optimally between the different VMs.

Complete the definition with advantages and disadvantages of virtualization.

Advantages of virtualization:

• Exploiting the potential of your own hardware
• Cost savings / Energy saving, because less hardware is needed
• more flexibility
• easier upgrade and downgrade of used / unused extensions
• Through virtualization, custom labs can be implemented to test environments in advance.

Disadvantages of virtualization:

• In the event of a hardware failure, all virtual machines are affected.
• Higher response times with many VM’s on one hardware
• Performance degradation as the hypervisor also requires resources
• Bottlenecks can occur if there are many parallel accesses to the server.