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The term "Infrastructure as Code" (IaC) in DevOps refers to the practice of managing and provisioning infrastructure through code and automation. This approach allows developers and operations teams to define the infrastructure in descriptive code formats, enabling them to automate the setup, configuration, and management of servers, networks, and other elements of the IT infrastructure.

Implementing IaC streamlines the process of deploying infrastructure, making it consistent and repeatable. It also aligns with DevOps principles, promoting collaboration between development and operations. With IaC, changes can be tracked using version control systems, allowing for easy rollbacks, audits, and collaboration among team members.

In contrast, relying solely on physical servers (as mentioned in another choice) does not leverage automation and the many benefits of version-controlled configurations. Exclusively using graphical interfaces or eliminating configuration management would not enable the direct, programmable approach that IaC advocates, thus missing the efficiencies gained through code. Therefore, managing infrastructure through code and automation stands out as a hallmark of the Infrastructure as Code philosophy.