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2 feet

3 feet

4 feet

5 feet

TIA 942, TIA 607 and IEEE 1100

UL 467, UL 96A and NFPA 70

TIA 568, ANSI/TIA-606-B and TIA 568-C.1

ASHRAE Standard 90.1, ASHRAE Standard 62.1 and ASHRAE Standard 55

Star

Mesh

Bus

Top of Rack

inside the computer room

within a designated telecommunication space outside of computer rooms

on another floor entirely from the operations center

in an offsite location

N+1 redundancy means that there is one additional backup component while 2N redundancy means that there are two identical backup components

N+1 redundancy is more reliable than 2N redundancy

2N redundancy is more cost-effective than N+1 redundancy

N+1 redundancy is more flexible and adaptable to changing needs than 2N redundancy

removes maintenance item, removes a source of heat, allows P D U to occupy less expensive space

reduces cable congestion, prevents water damage, provides better access points

increases cooling efficiency, eliminates fire hazard, minimizes noise pollution

lowers electricity costs, improves network speed, enhances security measures

it should be filled with blanking devices to reduce non-functional airflow

it should be used for additional storage purposes

it should be left open to allow for better ventilation

they should be turned off to save energy costs