Cisco Designing Cisco Data Center Infrastructure Exam Practice Test
The Cisco Designing Cisco Data Center Infrastructure exam concerns architecture decisions for data center facilities, compute, storage, and network infrastructure. Practice-bank scenarios involve estimating capacity, reducing shared failure risks, maintaining service availability, and designing predictable paths and latency as infrastructure scales.
Exam overview
About the Cisco Designing Cisco Data Center Infrastructure Exam
Data center design work requires translating workload and facility needs into resilient, scalable infrastructure choices. Relevant skills include estimating storage growth from workload demand, checking rack space alongside power and cooling limits, and comparing cooling requirements with delivered capacity. Network design decisions may involve topology depth, east-west traffic latency, and centralized switch configuration that preserves local forwarding when management services are unavailable. High availability also depends on identifying shared failure points—for example, redundant server power supplies connected to the same vulnerable distribution equipment, or administrator authentication dependent on one identity server. Storage design considerations include data-integrity capabilities that reduce the likelihood of undetected corruption. These scenarios call for evaluating dependencies and capacity constraints together rather than treating compute, network, storage, and facility systems as isolated components.
Sample Practice Questions
Review a selection from this exam's published US Practice Tests practice bank.
A data center team is evaluating a new server workload whose storage demand is expected to grow rapidly. Which capacity-planning input is most useful for estimating storage growth?
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Correct answer: AStorage capacity estimates should account for present data volume, expected growth, and how long data must be retained. These inputs help distinguish usable capacity needs from raw device capacity and support a realistic expansion plan.
A design review finds that application servers depend on a shared external DNS service. Which design measure most directly improves name-resolution availability during a single DNS server failure?
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Correct answer: AMultiple DNS servers, with clients configured to use them, can preserve name resolution when one server becomes unavailable. Co-locating instances on one host creates a common failure point, while the other choices do not improve DNS service resilience.
A design requires a consistent, centralized way to assign configuration to many switches while retaining local forwarding if the management system is temporarily unavailable. Which approach best fits this goal?
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Correct answer: AA controller can automate and standardize configuration, while the switches' data planes continue forwarding using installed state during a controller outage. The controller should not be required to process each packet in the forwarding path.
A data center must maintain a consistent maximum path length as additional leaf switches are added. Which topology property best supports this goal?
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Correct answer: AIn a leaf-spine fabric, leaf switches connect to the spine layer, so traffic between leaves traverses a predictable number of fabric hops. Adding leaf switches generally does not increase that path length, provided spine capacity is maintained.
An application requires a low probability of undetected data corruption when information is written to storage. Which capability is most directly relevant?
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Correct answer: AEnd-to-end integrity mechanisms detect corruption across the data path, from the application or host through storage. More VLANs, larger subnets, and link aggregation address other network concerns and do not by themselves verify stored data integrity.
When estimating whether a rack can support additional servers, which factor should be checked alongside available rack units?
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Correct answer: APhysical capacity includes power and thermal limits as well as space. A rack with available mounting units may still be unable to support additional equipment if power or cooling capacity is insufficient.
A data center application requires predictable east-west latency between virtual machines on different racks. Which fabric characteristic most directly supports this requirement?
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Correct answer: AA leaf-spine fabric gives endpoints a consistent, small number of network hops and can provide multiple equal-cost paths, supporting predictable east-west connectivity as the fabric grows.
How to use this practice test
The free practice bank contains 50 questions; each session presents up to 20 random questions. Use a session to work through design scenarios involving capacity, availability, topology, storage integrity, and facility constraints, then review the results to identify concepts that need closer attention.
Preparation tips
- For capacity-planning scenarios, distinguish workload growth forecasts from current utilization, and account for rack units, power, and cooling as separate constraints.
- Map failure dependencies across redundant components, including power distribution, DNS, and centralized identity services; check whether redundancy removes the shared failure point.
- Compare network topologies by path length and east-west latency as leaf switches are added, and consider how management-plane outages affect local forwarding.
- Review storage integrity concepts and determine how capabilities such as end-to-end data protection address undetected corruption risks.
- Practice relating facility cooling demand to delivered cooling capacity so expansion decisions account for both the IT load and cooling-system limits.