Define entity classes for AUTO Industry-- and draw ERD (entity relationship diagram). (see additional readings) see examples of entities on page 154 for a Record Company TRACKS MUSICIAN I RECORDING CATEGORY will computing Software as a Services Services dynamic scaling daster recovery service DS muth rondo FIGURE 3.25 Cloud Service Delivery Mode no companies get the immediate en reducing capital expenditures. They the added benefits of ability and de Hors com wwwtworking quinto per Examen ECZ Ofers applications on a paper bars Example Salesforce.com Potom Offers hardware.networking applications of a bebe Example Gratis Salesforce.com is one of the most popular Sus provider i bund delivered a sales on application for the typical salesperson that comes to such as tracking sales leads and prospects and forecast Tepping the power of Sam provide access to a large scale, carrastructure song with any needed sop port, which is especially able for a starp il company with financial resources Dates Service (S) faces the of criticata in any secure and affordable manner and depends on the principle that specified usut cas con be su to us on demand, rospective of any organical or gogo separation between consumers and providers Security as a Service ( 55) involves applications such as antivirus software devred over the Internet with constant wus definition updates that are not rent on user como ance Security as a Service is sometimes referred to as cloud security Security as a Service provides top security expertise that is traditionally better than can be found in an organiza tion Security as a Service providers include Cisco, McAfee, typically part of a disaster recovery plan or businest continuity plan Currently the most popular las operation is Amazon's Elastic Compute Cloud, generally known as Amazon EC2, or simply EC2 EC2 provides a web interfice through which customers can load and run their own applications on Amazon's compul ers. Customers control their own operating environments they can create, run, and stop services as needed, which is why Amazon describes EC2 as clase.laas is a perfect fit for compa nies with research-intensive projects that need to process large amounts of information at irregular intervals such as those in the scientific or medical fields. Cloud computing services offer these companies considerable cost savings because they can per form testing and analysis at levels that are not possible without access to additional and very costly computing infrastructure Software as a Service (SaaS) Software as a Service (SaaS) delivers applications over the cloud using a pay peruse revenue model. Before its introduction, companies often spent huge amounts of money implementing and customizing specialized applications to satisfy their business requirements Many of these applications were difficult to implement expensive to maintain, and challenging to use. Usability was one of the big- gest drivers for creating interest in and success for cloud comput- ing service providers SaaS offers a number of advantages the most obvious is tremen- dous cost savings. The software is priced on a per-use basis with and Symantec Unified Communications as a Service (UCaaS) offers enterprise communication and collaboration services over the Internet such as instant messaging systems, online meet ings, and video conferencing Businesses using UCaaS avoid the large payouts and expenses associated with deploying a unified Communications solution on their own. Another advantage of UCaaS is that it provides core business tasks with a high level of availability, flexibility, and scalability UCaaS include single-tenancy and multitenancy implementa tions. Single-tenancy UCaaS offers a software platform that is integrated with a single enterprise's on-site applications. Mul titenancy UCaaS offers a single software platform that many enterprises can access Enterprises can also adopt a hybrid approach, keeping a portion of their unified communications on site and other applications in the cloud Platform as a Service (PaaS) Platform as a Service (PaaS) supports the deployment of entire systems, 154 MODULE 2 Technical Foundations of MIS