Explanation

Infrastructure as Code (IaC) is a key DevOps practice that involves managing and provisioning computing infrastructure through machine-readable definition files, rather than physical hardware configuration or interactive configuration tools.

Key points about Infrastructure as Code:

• Automates provisioning: IaC allows you to define your infrastructure using code (like AWS CloudFormation, Terraform, or AWS CDK)
• Version control: Infrastructure definitions can be stored in version control systems
• Reproducibility: The same infrastructure can be deployed consistently across different environments
• Scalability: Infrastructure can be easily scaled up or down programmatically

Why the other options are incorrect:

• Option A: While migration can be automated, IaC specifically focuses on infrastructure provisioning, not hardware migration
• Option B: Third-party audits are separate security processes, not the primary purpose of IaC
• Option C: Application code deployment is handled by different services (like AWS CodeDeploy), not infrastructure provisioning

AWS Services that support IaC:

• AWS CloudFormation
• AWS CDK (Cloud Development Kit)
• Terraform with AWS provider
• AWS SAM (Serverless Application Model)