Introduction to cloud

Cloud computing is the use of a pool of resources __________ that are delivered as a service over the Internet.

hardware or software

Cloud computing allows users to __________ computing services over the Internet.

pay only for the services they use

The goal of cloud computing is to cut costs and help users focus on their __________ instead of being impeded by IT obstacles.

core business

The term __________ refers to an organization moving away from a traditional capex model to the opex model.

moving cloud

Cloud computing began to evolve in the __________ when telecommunications companies offered VPN services.

1990s

The main enabling technology for cloud computing is __________, which abstracts physical infrastructure.

virtualization

A __________ is a service provisioning model in which computing resources are provided as needed and billed based on usage.

utility computing

One essential characteristic of cloud computing is __________, which allows users to obtain cloud services without IT assistance.

on-demand self-service

Cloud computing provides resources as services and uses __________ to allow global and easy access to cloud services.

service-oriented architecture (SOA)

A cloud system can enhance performance through __________, which enables sharing of resources and costs across multiple users.

multitenancy

a computer network in which each computer's resources (processing power, memory and data storage) are shared with every other computer in the system.

Grid Computing

_______ improves with users' ability to re-provision technological infrastructure resources.

Agility

__________ is an application program interface that uses HTTP requests to GET, PUT, POST and DELETE data.

REpresentational State Transfer API

Name Cloud Computing Characteristics

Agility

API accessibility

Cost

Device and location independence

Virtualization technology

Multitenancy

Device and location independence

_______ enables users to access systems using a web browser regardless of their location or what device they are using (e.g. PC, mobile phone). As infrastructure is off-site (provided by a third-party) and accessed via the Internet, users can connect from anywhere.

Broad network access

Cloud computing resources are accessible over the network, supporting an array of client platforms such as mobile devices and workstations (thin or thick client platforms, e.g., mobile phones, tablets, laptops, and workstations)

Resource pooling

Service multiple customers from the same physical resources, by securely separating the resources on logical level.

Rapid elasticity

Resources are provisioned and released on-demand and/or automated. This will make sure your application will have exactly the capacity it needs at any point of time.

Measured service

Resource usage are monitored, measured, and reported (billed) transparently based on utilization. In short, pay for use.