Virtual Resources and Distributed Cloud Applications Chapter 2 Quiz

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Questions and Answers

What is the main idea of IaaS-level?

Creating software applications

Offering dedicated servers

Providing virtual resources (correct)

Physical hardware provisioning

According to NIST, what is virtualization?

Virtualization has no specific definition according to NIST

Simulation of software and/or hardware on which other software runs (correct)

Running software on a real system

Physical installation of hardware components

Which term is often used to refer to the real system in virtualization?

Guest (system)

Virtual machine (VM)

Isomorphism

Host (system) (correct)

What does a virtual machine (VM) emulate?

Hardware that is used by the operating system and running processes Signup and view all the answers

What are the use cases for virtual machines (VMs)?

Run a different operating system than installed on host Signup and view all the answers

What characteristic can be different for VMs compared to the physical host?

Number of cores Signup and view all the answers

How are VMs often started in Infrastructure-as-a-Service clouds?

From available images with an installed operating system and applications Signup and view all the answers

What do public cloud providers predominantly charge for VM instances?

'Pay by the hour' of VM instances Signup and view all the answers

What is one of the use cases for virtual machines (VMs) mentioned in the text?

'Operating multiple isolated environments on a host' Signup and view all the answers

What is the formal definition of virtualization according to NIST?

'Virtualization is the simulation of the software and/or hardware upon which other software runs' Signup and view all the answers

What is the main goal of rapid provisioning in the context of IaaS?

To ensure that resources are available to the consumer quickly without any delay Signup and view all the answers

In the context of cloud computing, what does elasticity aim to achieve?

Create an illusion of infinite resources for the consumer Signup and view all the answers

What is the primary concern regarding the isolation of different consumers in the context of IaaS?

Users must not interfere with each other Signup and view all the answers

Which approach aims to maintain good performance despite challenges in cloud computing?

OS-Level Virtualization Signup and view all the answers

What is the key challenge for IaaS providers regarding the management of data centers?

Elasticity Signup and view all the answers

Which virtualization technique relies on hardware support to create virtual machines?

Hardware-Assisted Virtualization Signup and view all the answers

Study Notes

IaaS-level and Virtualization

IaaS-level provides a high degree of control and flexibility to users, allowing them to configure and manage their infrastructure.

Virtualization

Virtualization is a technique that creates a virtual version of a device or resource, such as a server, storage device, or network.
According to NIST, virtualization is a technology that enables the creation of a virtual version of a device or resource, such as a server, storage device, or network.

Terms and Concepts

The term "bare metal" is often used to refer to the real system in virtualization.
A virtual machine (VM) emulates a physical machine, allowing multiple virtual machines to run on a single physical host.

Virtual Machines (VMs)

Use cases for VMs include development, testing, and deployment of applications, as well as providing a sandbox environment for users.
VMs can have different characteristics compared to their physical host, such as different operating systems or resource allocations.
VMs are often started in Infrastructure-as-a-Service (IaaS) clouds using templates or images.

Cloud Computing

Public cloud providers predominantly charge for VM instances based on the amount of resources used, such as CPU, memory, and storage.
One of the use cases for VMs mentioned in the text is development, testing, and deployment of applications.

Rapid Provisioning and Elasticity

The main goal of rapid provisioning in the context of IaaS is to quickly and efficiently deploy new resources and services.
Elasticity in cloud computing aims to achieve scalable and flexible resource allocation, allowing users to quickly adapt to changing business needs.

Isolation and Performance

The primary concern regarding the isolation of different consumers in the context of IaaS is to ensure that each user's resources and data are securely isolated from others.
The approach that aims to maintain good performance despite challenges in cloud computing is load balancing and resource optimization.

IaaS Providers and Data Centers

The key challenge for IaaS providers regarding the management of data centers is ensuring high availability, scalability, and efficiency while maintaining low costs.

Virtualization Techniques

The virtualization technique that relies on hardware support to create virtual machines is hardware virtualization.

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Description

Test your knowledge on virtual resources, infrastructure-as-a-service, system virtualization, virtual machine migration, resource isolation, and OS-level virtualization in the context of distributed cloud applications. This quiz covers topics related to virtual resources and operating systems in the context of cloud computing.