Answer: Dedicated Reserved Hosts

## Explanation **Correct Answer: A. Dedicated Reserved Hosts** ### Key Factors in This Scenario: 1. **Software Licensing Model**: The application uses socket and core-based licensing, which is tied to physical hardware specifications. 2. **Existing Licenses**: The company wants to use licenses purchased earlier this year, which are typically bound to specific hardware configurations. 3. **Predictable Capacity and Uptime Requirements**: The workload has steady, predictable usage patterns. ### Why Dedicated Reserved Hosts is the Best Choice: - **Physical Server Isolation**: Dedicated Hosts provide physical servers dedicated to a single customer, which is essential for software licensing models that track sockets and cores. - **License Mobility**: AWS Dedicated Hosts allow you to use your existing server-bound software licenses, including those with socket/core-based licensing. - **Cost Optimization**: By reserving Dedicated Hosts for 1 or 3 years, you get significant cost savings (up to 70% off On-Demand pricing) while meeting the predictable capacity requirements. - **Compliance with Licensing Terms**: Many commercial software vendors require dedicated physical hardware for their licensing models, which Dedicated Hosts provide. ### Why Other Options Are Less Suitable: - **B. Dedicated On-Demand Hosts**: While providing physical isolation, On-Demand pricing is more expensive than Reserved pricing for predictable workloads. - **C. Dedicated Reserved Instances**: Dedicated Instances run on hardware dedicated to a single customer but may be moved between different physical hosts, which could violate socket/core licensing requirements. - **D. Dedicated On-Demand Instances**: Similar to option C, but with higher costs due to On-Demand pricing. ### Additional Considerations: - Dedicated Hosts give you visibility into the number of sockets and physical cores, which is crucial for compliance with socket/core-based licensing. - Reserved Hosts provide capacity reservation, ensuring your dedicated hardware is available when needed. - The combination of dedicated physical hardware with reserved pricing offers the best balance of licensing compliance and cost-effectiveness for this scenario.

Author: LeetQuiz Editorial Team