Infrastructure as a Service (IaaS)

C.

Platform as a Service (Peas) is a way to rent operating systems, storage and network capacity over the Internet.

The service delivery model allows the customer to rent virtualized servers and associated services for running existing applications or developing and testing new ones.

For your exam you should know below information about Cloud Computing: Cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction.

This cloud model promotes availability and is composed of five essential characteristics, three service models, and four deployment models.

Cloud Computing - Cloud computing service models: Cloud computing service models -

Software as a Service (Seas) Software as a Service (Seas) is a software distribution model in which applications are hosted by a vendor or service provider and made available to customers over a network, typically the Internet.

SaaS is closely related to the ASP (application service provider) and on demand computing software delivery models.

IDC identifies two slightly different delivery models for Seas.

The hosted application management (hosted AM) model is similar to ASP: a provider hosts commercially available software for customers and delivers it over the Web.

In the software on demand model, the provider gives customers network-based access to a single copy of an application created specifically for Seas distribution.

Provider gives users access to specific application software (CRM, e-mail, games)

The provider gives the customers network based access to a single copy of an application created specifically for Seas distribution and use.

Benefits of the Seas model include: easier administration automatic updates and patch management compatibility: All users will have the same version of software.

easier collaboration, for the same reason global accessibility.

Platform as a Service (Peas) Platform as a Service (Peas) is a way to rent operating systems, storage and network capacity over the Internet.

The service delivery model allows the customer to rent virtualized servers and associated services for running existing applications or developing and testing new ones.

Cloud providers deliver a computing platform, which can include an operating system, database, and web server as a holistic execution environment.

Where Iasi is the raw IT network, Peas is the software environment that runs on top of the IT network.

Platform as a Service (Peas) is an outgrowth of Software as a Service (Seas), a software distribution model in which hosted software applications are made available to customers over the Internet.

Peas has several advantages for developers.

With Peas, operating system features can be changed and upgraded frequently.

Geographically distributed development teams can work together on software development projects.

Services can be obtained from diverse sources that cross international boundaries.

Initial and ongoing costs can be reduced by the use of infrastructure services from a single vendor rather than maintaining multiple hardware facilities that often perform duplicate functions or suffer from incompatibility problems.

Overall expenses can also be minimized by unification of programming development efforts.

On the downside, Peas involves some risk of "lock-in" if offerings require proprietary service interfaces or development languages.

Another potential pitfall is that the flexibility of offerings may not meet the needs of some users whose requirements rapidly evolve.

Infrastructure as a Service (Iasi) Cloud providers offer the infrastructure environment of a traditional data center in an on-demand delivery method.

Companies deploy their own operating systems, applications, and software onto this provided infrastructure and are responsible for maintaining them.

Infrastructure as a Service is a provision model in which an organization outsources the equipment used to support operations, including storage, hardware, servers and networking components.

The service provider owns the equipment and is responsible for housing, running and maintaining it.

The client typically pays on a per-use basis.

Characteristics and components of Iasi include: Utility computing service and billing model.

Automation of administrative tasks.

Dynamic scaling.

Desktop virtualization.

Policy-based services.

Internet connectivity.

Infrastructure as a Service is sometimes referred to as Hardware as a Service (HaaS)

The following answers are incorrect: Data as a service - Data Provided as a service rather than needing to be loaded and prepared on premises.

Software as a service - Software as a Service (Seas) is a software distribution model in which applications are hosted by a vendor or service provider and made available to customers over a network, typically the Internet.

Seas is closely related to the ASP (application service provider) and on demand computing software delivery models.

Infrastructure as a service - Infrastructure as a Service is a provision model in which an organization outsources the equipment used to support operations, including storage, hardware, servers and networking components.

The service provider owns the equipment and is responsible for housing, running and maintaining it.

The client typically pays on a per-use basis.

http://searchcloudcomputing.techtarget.com/definition/Software-as-a-Service http://searchcloudcomputing.techtarget.com/definition/Platform-as-a-Service-PaaS http://searchcloudcomputing.techtarget.com/definition/Infrastructure-as-a-Service-IaaS

The correct answer is D. Infrastructure as a service.

Infrastructure as a Service (IaaS) is a cloud computing service model that provides users with virtualized computing resources over the Internet. These resources can include operating systems, storage, and network capacity that can be rented by users on a pay-per-use basis.

With IaaS, users do not need to invest in physical hardware to support their applications or IT infrastructure. Instead, they can use the cloud provider's infrastructure to support their computing needs. This can provide significant cost savings, as users only pay for what they use, and do not need to maintain or upgrade their own hardware.

Examples of IaaS providers include Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform. These providers offer a wide range of computing resources, including virtual machines, storage, and networking capabilities that can be configured to meet the specific needs of users.

In contrast, Software as a Service (SaaS) provides users with access to software applications over the Internet, while Platform as a Service (PaaS) provides users with a complete development environment for building, testing, and deploying applications. Data as a Service (DaaS) is a relatively new cloud computing service model that provides users with access to data on demand, without the need to store the data locally.

In summary, IaaS is a cloud computing service model that provides users with virtualized computing resources over the Internet, including operating systems, storage, and network capacity, which can be rented on a pay-per-use basis.