Service Model IaaS PaaS SaaSUser Manage Application Application Application Middleware Middleware Middleware OS OS OS Server Server Server Network Network Network
IaaS OSから選べるのがメリット 自由にソフトを入れられるThe capability provided to the consumer is to provision processing, storage, networks, and other fundamentalcomputing resources where the consumer is able to deploy and run arbitrary software, which can includeoperating systems and applications. The consumer does not manage or control the underlying cloudinfrastructure but has control over operating systems, storage, and deployed applications; and possibly limitedcontrol of select networking components (e.g., host firewalls).
PaaS ユーザーの作ったプログラムを 動作させることができるThe capability provided to the consumer is to deploy onto the cloud infrastructure consumer-created oracquired applications created using programming languages, libraries, services, and tools supported by theprovider.3 The consumer does not manage or control the underlying cloud infrastructure including network,servers, operating systems, or storage, but has control over the deployed applications and possibly configurationsettings for the application-hosting environment.
SaaS 定型化されたアプリケーションサービス すぐに使えるのが特徴The capability provided to the consumer is to use the provider’s applications running on a cloud infrastructure2.The applications are accessible from various client devices through either a thin client interface, such as a webbrowser (e.g., web-based email), or a program interface. The consumer does not manage or control theunderlying cloud infrastructure including network, servers, operating systems, storage, or even individualapplication capabilities, with the possible exception of limited user-specific application configuration settings.
プライベートクラウド Private Cloud 自社のために オンプレミス（自社設備、自社運用）クラウドサービス もしくは、クラウドサービスを利用する 他社はアクセスできないClosedな環境 オンプレミスThe cloud infrastructure is provisioned for exclusive use by a single organization comprisingmultiple consumers (e.g., business units). It may be owned, managed, and operated by theorganization, a third party, or some combination of them, and it may exist on or off premises.
パブリッククラウド Public Cloud システムを丌特定ユーザが共用 クラウド提供者が管理する 細かな場所は公開されていない ユーザー立ち入り丌可The cloud infrastructure is provisioned for open use by the general public. It may be owned,managed, and operated by a business, academic, or government organization, or somecombination of them. It exists on the premises of the cloud provider.
コミュニティクラウド Community Cloud 複数の企業体などで利用する 同じ業種（建築、銀行）の会社 が利用したり、同じ業務で利 用することが多いThe cloud infrastructure is provisioned for exclusive use by a specific community of consumers fromorganizations that have shared concerns (e.g., mission, security requirements, policy, andcompliance considerations). It may be owned, managed, and operated by one or more of theorganizations in the community, a third party, or some combination of them, and it may exist on oroff premises.
ハイブリッドクラウドHybrid Cloud 複数のクラウドを組み合わせた呼び名 特色を生かしつつクラウド間の連携させて 利用することもあるThe cloud infrastructure is a composition of two or more distinct cloud infrastructures (private,community, or public) that remain unique entities, but are bound together by standardized orproprietary technology that enables data and application portability (e.g., cloud bursting for loadbalancing between clouds).