📘 Topic: Colocation Data Center Services

Domain: D4 – Physical and Environmental Security
Tags: #cissp

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🧾 Definition

Colocation means renting space in a third-party data center to host an organization’s servers and networking equipment. It shifts some physical infrastructure responsibilities to the provider while leaving security and operations responsibilities with the customer.

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🔑 Key Points

• Shared responsibility applies to power, cooling, physical access, and connectivity.
• The provider typically manages facility controls, while the customer manages equipment and application security.
• Contracts should define uptime commitments, access procedures, incident response, and audit rights.
• Physical security controls include guards, badges, cameras, and environmental monitoring.

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⚠️ CISSP Insight

• Colocation reduces infrastructure burden but does not reduce the need for strong governance and control oversight.
• Organizations should verify that the provider’s controls align with their regulatory and business requirements.

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⚔️ Key Difference / Trap

• Colocation vs cloud
  • Colocation = you still manage the equipment in a provider’s facility
  • Cloud = provider usually manages more of the underlying infrastructure
• Provider controls are not automatically your controls
  • Contract and assurance evidence matter

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🏗️ Example

An organization moves its servers into a colocated data center and retains responsibility for patching, monitoring, and access management while relying on the provider for power and facility security.

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📚 References

• NIST SP 800-53, PE family
• TIA-942, Data Center Standards
• ISO/IEC 27001:2022

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🔁 Quick Recall

• Colocation = rented facility space
• Shared responsibility = still your security responsibility