CISSP · Question #1315
A company whose Information Technology (IT) services are being delivered from a Tier 4 data center, is preparing a companywide Business Continuity Planning (BCP). Which of the following failures shoul
The correct answer is A. Application. Tier 4 data centers provide fault-tolerant infrastructure with redundant power, cooling, and network, so infrastructure-level failures are mitigated by design, leaving application-layer failures as the primary BCP concern.
Question
Options
- AApplication
- BStorage
- CPower
- DNetwork
How the community answered
(32 responses)- A69% (22)
- B6% (2)
- C19% (6)
- D6% (2)
Why each option
Tier 4 data centers provide fault-tolerant infrastructure with redundant power, cooling, and network, so infrastructure-level failures are mitigated by design, leaving application-layer failures as the primary BCP concern.
Tier 4 data centers (as defined by the Uptime Institute) provide fully fault-tolerant systems with 99.995% uptime, including redundant power feeds, cooling, and network paths, meaning physical infrastructure failures are engineered out. Application failures-such as software bugs, misconfigurations, or logical errors-are not addressed by data center tier ratings and therefore remain a legitimate BCP concern that the IT manager must plan for.
Tier 4 data centers include redundant storage paths and fault-tolerant infrastructure, so storage-level failures are mitigated by the facility's design and are not a primary BCP concern.
Tier 4 data centers require at least two independent power distribution paths and have enough capacity to tolerate any single failure, making power outages a non-issue at this tier.
Tier 4 data centers include fully redundant network infrastructure with multiple diverse paths, so network failures are addressed by the physical facility design and are not a primary BCP concern.
Concept tested: Tier 4 data center fault tolerance and BCP scope
Source: https://uptimeinstitute.com/tiers
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