Define each of the following: IaaS, SaaS, DaaS, and PaaS.

What will be an ideal response?

IaaS(infrastructure as a service) uses software to emulate hardware capabilities, enabling companies to scale, or adjust up or down, storage, processing power, or bandwidth as needed. For example, retailers may need to increase these capabilities to accommodate additional traffic to their websites during busy holiday shopping seasons. When the season ends, retailers easily can reduce these settings.?SaaS (software as a service) describes a computing environment where an Internet server hosts and deploys applications. Editing documents or photos, sending email messages, and managing finances are common consumer tasks of SaaS applications. A pioneering provider of SaaS applications for companies is Salesforce, which offers customer relationship management (CRM) software. Salesforce users subscribe to modules to handle tasks such as sales and marketing campaigns and customer services.?Government agencies, companies, and social media sites make data available for developers to incorporate in applications or to use when making business decisions and plans. DaaS (data as a service) allows users and applications to access a company's data. Mashups are applications that incorporate data from multiple providers into a new application. Displaying homes or crime statistics on a map are examples of mashups that require data from real estate, police records, and mapping providers.?Application developers need to maintain computers running specific hardware, operating systems, development tools, databases, and other software. PaaS (platform as a service) allows developers to create, test, and run their solutions on a cloud platform without having to purchase or configure the underlying hardware and software.