4.1 Virtualization Concepts

Question 1

What is virtualization?

Answer 1

A technology that allows one physical computer to run multiple operating systems at the same time.

Virtualization enhances resource utilization and flexibility.

Question 2

What is a virtual machine (VM)?

Answer 2

A virtualized operating system that runs on a physical host and has its own CPU, memory, storage, and network resources.

VMs operate independently from the host system.

Question 3

What is host-based virtualization?

Answer 3

Virtualization where a primary desktop operating system (such as Windows or macOS) runs VMs on top of it using virtualization software.

This type of virtualization is common for personal use.

Question 4

Give an example of host-based virtualization.

Answer 4

Running Linux or Windows inside virtualization software on a macOS or Windows desktop.

This allows users to utilize different operating systems without needing separate hardware.

Question 5

What is enterprise virtualization?

Answer 5

Virtualization where a single physical server runs multiple virtual machines without a traditional desktop interface, commonly used in data centers.

It is designed for efficiency and scalability.

Question 6

What is the purpose of enterprise virtualization?

Answer 6

To maximize hardware efficiency, reduce costs, and manage multiple servers using fewer physical machines.

This approach is essential for modern data center operations.

Question 7

When was virtualization first introduced?

Answer 7

In 1967 on IBM mainframe computers.

This innovation laid the groundwork for modern computing practices.

Question 8

What is sandboxing in virtualization?

Answer 8

Using virtual machines to create isolated environments for testing software without affecting the host system.

Sandboxing is crucial for safe software development and testing.

Question 9

Why are snapshots useful in virtualization?

Answer 9

They allow users to revert a virtual machine to a previous state after changes or failures.

Snapshots provide a safety net for testing and development.

Question 10

How does virtualization support legacy software?

Answer 10

It allows older applications to run on operating systems they were designed for, even if the host OS is newer.

This compatibility is vital for businesses relying on older software.

Question 11

Give an example of legacy software support using virtualization.

Answer 11

Running Windows 10 applications inside a VM on a Windows 11 computer.

This ensures continuity for users of older applications.

Question 12

What is cross-platform virtualization?

Answer 12

The ability to run different operating systems (Windows, macOS, Linux) simultaneously on the same physical machine.

This flexibility is beneficial for developers and testers.

Question 13

What is a key benefit of cross-platform virtualization?

Answer 13

It eliminates the need to reboot or maintain multiple physical systems, saving time and resources.

This efficiency is crucial in fast-paced IT environments.