Amazon EC2 (Elastic Compute Cloud) is a web service offered by Amazon Web Services (AWS) that allows users to rent virtual servers, known as instances, in the cloud. Here’s what it does:

  1. Scalable Compute Capacity: EC2 provides scalable compute capacity, allowing users to increase or decrease their server resources based on demand. This scalability helps in handling varying workloads efficiently.
  2. Various Instance Types: EC2 offers a wide range of CPU, RAM, storage, and networking configurations, known as instance types, to cater to different application requirements. Users can choose the instance type that best suits their needs.
  3. On-Demand Provisioning: With EC2, users can provision instances on-demand, meaning they can quickly deploy virtual servers whenever they need them, without the need to invest in physical hardware.
  4. Pay-As-You-Go Pricing: EC2 follows a pay-as-you-go pricing model, where users are charged only for the resources they consume within a billing cycle. This model allows users to convert capital expenditure (CapEx) into operating expenditure (OpEx), as they pay for the services they use.
  5. Flexibility in Instance Sizes: EC2 instances are available in different sizes, enabling users to choose the most suitable size for their workloads. This flexibility, known as rightsizing, helps optimize resource utilization and minimize costs.
  6. Billing Methods: AWS offers various billing methods for EC2, including On-Demand Pricing, Savings Plans, Reserved Pricing, Spot Pricing, and Dedicated Hosts Pricing. Each method has its own pricing structure and benefits, allowing users to choose the most cost-effective option for their needs.
  7. Billing Flexibility: EC2 pricing can be hourly or per second, with a 60-second minimum commitment for per-second billing. This flexibility allows users to optimize costs based on their workload patterns, such as for testing and staging environments.

Overall, Amazon EC2 provides a flexible and scalable infrastructure solution for hosting applications and managing computing resources in the cloud.

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