Cloud Computing

Correct Answer: Public Cloud Storage

Public Cloud Storage would be the best choice for a small business with a limited budget looking to set up a cloud-based backup solution. Public cloud storage is typically more cost-effective compared to private or hybrid cloud storage since the infrastructure is shared among multiple users and the costs are distributed. It allows the business to store and retrieve their data easily without having to invest in and maintain their own storage infrastructure. Private cloud storage would be more expensive as it requires dedicated infrastructure. Hybrid and multi-cloud storage involve using a combination of public and private clouds or multiple cloud providers, which may be more complex and costly than necessary for a small business with straightforward backup needs.

Correct Answer: Geo-redundancy

Geo-redundancy is the correct answer because it best addresses the requirement as described in the question. It involves the replication of resources across multiple geographic locations to ensure the availability of data even in the event of failures or disruptions in a particular region. High availability does fall under redundancy, but it does not necessarily imply across different geographic regions. Scalability is related to expanding resources to handle increased demands, but it does not specifically deal with the duplication of resources across locations. Elasticity, on the other hand, refers to the ability of a system to adapt to workload changes by provisioning and de-provisioning resources in an autonomic manner, which is also not what the question specifies. Therefore, Geo-redundancy is the correct answer.

Correct Answer: Software as a Service (SaaS)

The company should choose Software as a Service (SaaS) for their cloud-based backup solution. Here's why: 1. SaaS provides a complete software solution: In the SaaS model, the cloud provider manages the entire software application, including the infrastructure, platform, and software itself. This means the company can use the backup solution without worrying about the underlying infrastructure or maintenance. 2. Encryption and security: SaaS backup solutions typically offer built-in encryption to protect the data both in transit and at rest. The cloud provider is responsible for ensuring the security of the data and the application. 3. Scheduled backups: SaaS backup solutions often provide automated and scheduled backup features, allowing the company to set up regular backups without manual intervention. This ensures that critical data is consistently backed up. 4. Version control: Many SaaS backup solutions include version control, which allows the company to restore data from a specific point in time. This is useful for recovering from accidental deletions, corruptions, or ransomware attacks. 5. Ease of use: SaaS solutions are designed to be user-friendly and accessible via a web browser, making it easy for the company to manage their backups without requiring extensive technical knowledge. The other cloud service models mentioned are less suitable for this specific use case: - IaaS and PaaS provide more control over the infrastructure and platform, but the company would need to manage the backup software themselves. - BaaS, DaaS, and DBaaS are focused on specific aspects of cloud computing (backend, desktop, and database) and do not provide a comprehensive backup solution. In summary, SaaS is the most appropriate cloud service model for a company seeking a cloud-based backup solution with encryption, scheduled backups, and version control.