Comprehensive and Detailed Explanation From Exact Extract:
In a colocation data center model, the facility (building, power, cooling, physical security, and connectivity) is owned and managed by a third-party provider, while the enterprise typically installs and manages its own servers and network equipment inside that facility. The key difference from an on-premises data center is who is responsible for operating and managing the physical environment.
An on-premises data center is located at and operated by the enterprise itself, which means the organization directly manages the building infrastructure, power, cooling, physical access, and related facilities.
Option A is incorrect because using dedicated hardware provided by the enterprise can occur in both on-premises and colocation models. It does not clearly distinguish colocation from on-premises.
Option B is incorrect because being located within the enterprise’s premises describes an on-premises data center, not a colocation center.
Option C is incorrect because ownership and operation by the enterprise also corresponds to an on-premises model.
Option D is correct because a colocation data center is managed by a third-party provider, who is responsible for the physical site and its supporting infrastructure while the enterprise uses that space to host its equipment.
[Reference:Information Technology Management Study Guide – Data Center Models and Hosting Options: On-Premises, Colocation, and Cloud (WGU ITM Curriculum)., ===========, ]