CCSP: Domain 3 - Secure Data Center Design Flashcards
What is the Uptime Institute Tier Classification System?
common measure for data centers that describes four tiers, where each defines requirements for maintenance, power, cooling and fault tolerance
Tier 1 data centers are expected to help protect against what?
human errors, not outages or disasters
Tier 1 data centers are expected to have what kind of redundancy controls?
chillers, pumps, UPS devices and generators; they are likely to get shut down for maintenance
Describe Tier 1 data center
basic infrastructure required to support an organization that wants to conduct IT operations
What are the requirements for Tier 1 data center?
- UPS for line conditioning and backup purposes
- area to house IT systems
- dedicated cooling systems
- power generator for extended outages
What is the uptime percentage for Tier 1 data center?
99,671%
What is the uptime percentage for Tier 2 data center?
99,741%
What is the uptime percentage for Tier 3 data center?
99,982%
What is the uptime percentage for Tier 4 data center?
99,995%
Tier 2 data centers are expected to have what types of redundancy controls?
- redundant generators and UPS devices
- redundant chillers and cooling units
- redundant pumps
- fuel tanks and other fuel storage
What’s the critical distinction of Tier 2 data center compared to Tier 1 data center?
Tier 2 data centers are intended to ensure that critical operations are not interrupted due to planned maintenance
What are Tier 3 data centers known as?
concurrently maintainable site infrastructure
What’s the critical distinction of Tier 3 data center compared to Tier 2 data center?
T3 adds multiple distribution paths, where only a sole path is needed to serve critical operations at any given time
What’s the commonality of T2 and T3 data center?
both have the redundant capacity components of T2
What’s the highest data center tier?
Tier 4
What are the hours of allowable downtime in T1 data center?
28,8 hours a year
What are the hours of allowable downtime in T4 data center?
< 0,5 hours a year
What redundancy controls are offered by T4 data centers?
- independent and physically isolated systems at the component and distribution path levels
- fault tolerant components
What is a reasonable minimum amount of time to expect the uninterruptible power supply (UPS) to provide power to the systems in the datacenter?
about 10 minutes
What is the purpose of Uninterruptible Power Supply (UPS)
provide power to systems for a short period of time, so power source can be quickly replaced by long-term backup power from a generator or similar source
You are selecting a datacenter environment to host a cloud application run by your organization. Your primary requirement is that the datacenter must require no shutdowns for equipment maintenance. What is the lowest level of datacenter that would be acceptable under the Uptime Institute tier system?
Tier 3; Tier 1 and 2 datacenters are not required to have sufficient redundant components to remain operational during equipment maintenance
Which option is best suited to handling brownouts in a cloud environment?
UPS
What does ping, power, and pipe refer to?
connectivity, power, and facility space with services like HVAC
What factor would probably most affect the design of a cloud datacenter?
- geographic location; facility’s geographic location influences both the requirements for things like HVAC as well as environmental threats like extreme weather
- alternatively availability of large amounts of power at a low price (2 questions are contradicting each other)
What are common elements in a fully redundant power system?
- power from two or more utility providers
- UPS devices in each rack
- multiple generators
Which characteristic of liquid propane increases its desirability as a fuel for backup generators?
liquid propane does not spoil, which obviates the need to continually refresh and restock it and might make it more cost-effective
What are Joint operating agreements?
provide nearby relocation sites so that a disruption limited to the organization’s own facility and campus can be addressed at a different facility and campus
In addition to battery backup, a UPS can offer which capability?
line conditioning; adjusting power so that it is optimized for the devices it serves and smoothing any power fluctuations
Generator fuel storage for a cloud data center should last for how long, at a minimum?
The Uptime Institute dictates 12 hours of generator fuel for all cloud data center tiers
Organization wants to ensure that a loss of chilled water does not cause an outage for their data center. What option should be in place in case of a failure of the chilled water system?
the ability to switch to utility water
What is the purpose of line conditioning in UPS?
ensure that the voltage and frequency provided to sensitive electronic devices remain within acceptable and consistent ranges, even in the presence of fluctuations or disturbances in the power supply
A generator transfer switch should bring backup power online within what time frame?
before the UPS duration is exceeded
How are Joint operating agreements useful?
provide a cost-effective way as a response to a localized incident or disaster as it provides a nearby relocation sites so that a disruption limited to the organization’s own facility and campus can be addressed at a different facility and campus
What are common physical security design features for data center facilities?
- Secured vehicular access and bollards to prevent ramming
- Guest and visitor access controls
- Cameras, alarm systems, and monitoring capabilities
- Protected placement for critical infrastructure
- Fire detection and suppression capabilities
- Interior access controls like locks, badging, and secured doors
What are the normal temperature and humidity guidelines for a data center?
- Temperature: 64° to 81° F (18° to 27° C)
- Humidity: Dew point of 42° to 59° F (5.5° to 15° C), relative humidity of 60%
