Topic 21, Data Centers Flashcards
What type of redundancy provides two additional units, modules, paths, or systems in addition to the MINIMUM required to satisfy the base requirement.
A. N
B. N+1
C. N+2
D. 2N
E. 2(N+1)
C. N+2
You are designing a cabling containment system installed overhead in a new data center.
The main or prime purpose of the system will be to manage fiber optic cabling between cabinets. You have a choice of designs of the containment system. In view of the prime purpose of containment system, your first choice of design will be one that:
A. Has a bottom design with a web spacing of less than 203 mm (8 in)
B. Has a bottom design with a web spacing of less than 152 mm (6 in)
C. Is manufactured with a soft cloth type material
D. Has a solid bottom design
E. The design is not important as long as the client pre approves the manufacturer
D. Has a solid bottom design
What does ANSI/TIA 942 recommend as the MINIMUM height for overhead cable tray above finished floor within a data center?
A. 2.14 m (7 ft)
B. 2.44 m (8 ft)
C. 2.75 m (9 ft)
D. 3.05 m (10 ft)
E. 3.36 m (11 ft)
C. 2.75 m (9 ft)
If you have a data center where the entire infrastructure must be completely shutdown on an annual basis to perform preventative maintenance and repair work, what tier level would this represent?
A. Tier I
B. Tier II
C. Tier III
D. Tier IV
A. Tier I
Within a data center, if you have dual path connectivity between the primary entrance room and secondary entrance room, in addition to dual connectivity between these two rooms and the main distribution and secondary distribution areas, what tier level would this infrastructure design represent?
A. Tier I
B. Tier II
C. Tier III
D. Tier IV
E. Tier V
D. Tier IV
If you are working on a physical security plan for a data center and focusing on building and access control, what layer of the plan would this relate to?
A. Layer 1
B. Layer 2
C. Layer 3
D. Layer 4
E. Layer 5
C. Layer 3
What is the MAXIMUM horizontal cable length permitted for centralized optical fiber cabling from the MDA within a data center?
A. 100 m (328 ft)
B. 200 m (656 ft)
C. 300 m (984 ft)
D. 400 m (1312 ft)
E. 500 m (1640 ft)
C. 300 m (984 ft)
Within a data center, if you have a system which includes one extra unit, in addition to the minimum required to satisfy the base need, and where the failure of this unit will NOT disrupt operations, what level of redundancy would this represent?
A. N
B. N+1
C. N+2
D. 2N
E. 2(N+1)
B. N+1
Within a data center, how many concentric layers are considered necessary to provide effective security?
A. One
B. Two
C. Three
D. Four
E. Five
D. Four
You have been asked to spec the physical security requirements related to the protection of assets for a new data center. The most common potential for damage categories you have considered include temperature, gases, organisms and projectiles. The one category that you have missed is:
A. Aircraft flight paths
B. Proximity to high speed rail links
C. Liquids
D. Parking lot exits
E. Exposure to extreme winds
C. Liquids
If you have a 30 cm (12 in) wide data tray, what does ANSI/TIA 569-B recommend be the maximum pathway fill cross sectional area assuming a MAXIMUM pathway depth of 15 cm
(6 in)?
A. 112.5 sq cm (18 sq in)
B. 150 sq cm (24 sq in)
C. 225 sq cm (36 sq in)
D. 300 sq cm (48 sq in)
E. 450 sq cm (72 sq in)
C. 225 sq cm (36 sq in)
It is important to keep all underfloor cabling systems very neat and orderly. Cabling systems must be managed to ensure that air flow is not impeded by the height or volume of underfloor cabling. Keeping copper communications cabling properly separated from is one design approach. To resolve this:
A. Power cabling should be routed in the space below the floor in either hot or cold aisle
B. Route the copper cables in the cold aisle and route the power cabling in the hot aisle
C. Power cabling should be routed in the overhead space
D. Route the copper cables in the hot aisle and route the power cabling in the cold aisle
E. Copper cabling can be routed in either hot or cold aisles without any consequence in performance of the network
D. Route the copper cables in the hot aisle and route the power cabling in the cold aisle
What type of redundancy provides two complete units, modules, paths or systems for every one required for a base system.
A. N -
B. N+1 -
C. N+2 -
D. 2N -
E. 2(N+1)
D. 2N -
