Choosing the Right Service Model for Your Accounting Application

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Cloud Infrastructure-based Applications " It moves your existing on-premises apps to the Infrastructure as a Service (IaaS) platform or re-hosts them. Lift & Shift is a common term for this type of relocation. The programs will be nearly identical to what they were before, but they will now be able to run on cloud VMs.

The given scenario describes a company that wants to purchase an Azure subscription and requires the availability of phone or email support to meet their support policy. The question asks whether recommending a Premier support plan would meet this requirement.

The Premier support plan is one of the highest levels of support offered by Microsoft Azure. It provides a comprehensive range of support services, including 24/7 technical support by phone and email, proactive monitoring and troubleshooting, and personalized technical account management. The Premier support plan also includes access to Azure Engineering for critical issues and offers tailored solutions for specific business needs.

Given the requirement of the company to have access to support engineers by phone or email, recommending the Premier support plan would be a suitable solution as it meets the requirement. The Premier support plan offers 24/7 technical support through phone and email, which satisfies the company's support policy.

Therefore, the answer to this question is A. Yes, recommending a Premier support plan meets the goal of providing an option to access support engineers by phone or email.

When considering moving an application to the cloud, it's important to understand the different service models available to determine which one is the best fit for your needs. The three primary service models are Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).

IaaS is the most basic service model where the cloud provider manages the infrastructure, including servers, storage, and networking, while the customer is responsible for managing the operating system, middleware, and applications. IaaS provides a high degree of flexibility and control but requires more effort and expertise from the customer.

PaaS is a higher-level service model where the cloud provider manages the underlying infrastructure as well as the operating system, middleware, and runtime environment, while the customer is responsible for the application and its data. PaaS is designed to simplify the deployment and management of applications and provides a high level of scalability and flexibility.

SaaS is the highest-level service model where the cloud provider hosts the application and manages all aspects of the infrastructure, including servers, storage, networking, and operating system. The customer accesses the application over the internet and typically pays for it on a subscription basis. SaaS provides the most ease of use and lowest level of maintenance, but also provides the least amount of flexibility.

In this scenario, the accounting application named App1 uses a legacy database, which suggests that the application is custom-built and may require a high level of control and flexibility. The most appropriate service model to use in this case would be PaaS. By using PaaS, the cloud provider would manage the underlying infrastructure as well as the operating system, middleware, and runtime environment, while the customer would retain control over the application and its data. This would allow for a simplified deployment and management of the application while also providing a high level of scalability and flexibility.