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Rackspace

What It Is

Rackspace is far less common today than AWS, Azure, or GCP, but it still appears in legacy and managed hosting environments.

Where It Helps to Understand It

managed infrastructure
support-heavy operational models
legacy migration projects

Practice

If you work with Rackspace infrastructure, first identify the current management model: classic managed hosting, OpenStack-based services, or a hybrid with hyperscaler clouds.