2.4 Explain important factors of physical installations Flashcards
(19 cards)
An Information Technology department is looking to improve the safety and reliability of their server closet. They already upgraded the cooling and power components but need to install a Class C extinguishing system.
What kind of facilities support component should the department invest in?
Fire suppression
An organization is planning to use power over ethernet (POE) to supply power to the wireless access points spread throughout the building.
What is the best cabling solution to support PoE? (Select two.)
- Shielded cabling
- Cat 3 cable or better
- Unshielded cabling
- Cat 5e cable or better
- Shielded cabling
- Cat 3 cable or better
PoE requires Cat 3 cable or better while PoE+ must use Cat 5e cable or better. Drawing power down the cable generates more heat that can adversely affect data rates.
PoE should use shielded cabling as it is capable of dispersing heat more efficiently than unshielded cabling.
PoE+ must use Cat 5e cable or better while PoE requires Cat 3 cable or better. Pure copper cabling with larger conductors improves thermal performance.
Drawing power down the cable generates more heat and unshielded cabling cannot disperse heat as efficiently as shielded cabling.
The sysadmin is receiving alerts that the servers are having issues. A Heat/Ventilation/Air Conditioning system failed in the server room.
What alerts did the sysadmin receive regarding the servers?
Temperature
What is the name of the smaller technical closets, typically found in large network environments, that connect back to a central technical closet?
IDF
A solutions architect is designing a cable management solution.
Which of the following is the most common wiring distribution?
Patch Panel
What is the primary reason for installing lockable doors on server racks?
To prevent unauthorized access to the equipment
What is the benefit of using lockable brackets and drawers within a rack?
To protect individual elements within a rack
An Information Technology department is looking to improve the safety and reliability of their server closet. They already upgraded the cooling and power components but need to install a Class C extinguishing system.
What kind of facilities support component should the department invest in?
- HVAC
- Uninterruptible Power Supply
- Fire Suppression
- PDU
- Fire suppression
Fire suppression systems work based on the fire triangle. The fire triangle works on the principle that fire requires heat, oxygen, and fuel to ignite and burn. Removing any one of those elements provides fire suppression (and prevention).
Building control systems maintain an optimum working environment for different parts of the building. The acronym HVAC (Heating, Ventilation, Air Conditioning) often describes these services.
Uninterruptible power supplies (UPSs) can keep servers, switches, and routers running for a few minutes. This provides time to switch to a secondary power source.
A power distribution unit (PDU) has circuitry to “clean” the power signal by protecting against spikes, surges, and brownouts and can integrate with an uninterruptible power supply (UPS).
A sysadmin recently completed an upgrade to the data center. Shortly after, the electric company cut a power line to the building, but the data center continued to operate until they repaired the power line.
Which of the following solutions did the sysadmin MOST likely set up to prevent downtime?
- MTBF
- PDU
- UPS
- HVAC
UPS
What is the primary purpose of using fiber distribution panels in a fiber optic network?
- To convert electrical signals into optical signals
- To enhance the speed of transmission over the network
- To provide a centralized location for connecting and managing fiber optic cables
- To increase the signal strength of the fiber optic cables
To provide a centralized location for connecting and managing fiber optic cables
What is used to connect a port on a patch panel to another network port, typically a switch port housed in the same rack?
- RJ-45
- Power line
- Fiber Optic Cable
- HDMI Cable
RJ-45 Patch Cord
What functionalities do remote power monitoring features in advanced Power Distribution Units (PDUs) typically offer? (Select two.)
- Direct internet access for connected devices
- Real-time power consumption monitoring
- Remove control of power to individual outlets
- Remote firmware updates for connected devices
- Real-time power consumption monitoring
- Remove control of power to individual outlets
The following are the functionalities of the remote monitoring features:
Real-time power consumption monitoring. Advanced PDUs often include the ability to monitor power consumption in real-time, providing valuable data on the power usage of connected devices. This feature helps in managing and optimizing power distribution efficiently.
Remote control of power to individual outlets. One of the key benefits of advanced PDUs is the capability to remotely control power to individual outlets. This allows administrators to turn power on or off to specific devices from a remote location, aiding in remote management and troubleshooting.
Remote firmware updates for connected devices is incorrect because PDUs do not manage or facilitate firmware updates for connected devices. Firmware updates are typically handled by the devices’ own management interfaces or systems.
Direct internet access for connected devices is incorrect because providing direct internet access is not a function of PDUs. PDUs are focused on power distribution and management, not networking or internet connectivity.
Automated environmental cooling adjustments based on power load is incorrect because, while PDUs monitor and manage power, they do not directly control environmental cooling systems. Cooling adjustments based on power load would require integration with a building management system or a dedicated cooling control system.
Why do equipment room and data center facilities tend to use high voltage circuits?
- To allow for a higher load capacity with lower amperage
- To double the amperage required for the same wattage load
- To decrease the efficiency of power distribution
- To reduce the overall power consumption of the facility
- To allow for a higher load capacity with lower amperage
High voltage circuits are used in data centers and equipment rooms because they allow for a higher load capacity while requiring lower amperage. This is beneficial because it reduces the risk of overloading circuits and allows for more efficient power distribution across the facility.
To double the amperage required for the same wattage load is incorrect because using high voltage circuits actually reduces the amperage required for a given wattage load, not increases it.
To reduce the overall power consumption of the facility is incorrect because while high voltage circuits can improve efficiency, they do not directly reduce the power consumption of devices. Power consumption is determined by the devices themselves.
To decrease the efficiency of power distribution is incorrect because the use of high voltage circuits aims to increase the efficiency of power distribution, not decrease it.
A system administrator notices that the server room’s cooling system frequently activates its emergency shutdown mode.
What environmental factor should the administrator investigate?
- Temperature
- Humidity
- Electrical
- Flooding
- Temperature
High temperatures make it difficult for device and rack cooling systems to dissipate heat effectively. This increases the risk of overheating components within device chassis and consequent faults and can lead to a server room’s cooling system frequently shutting down.
Computer systems need a stable power supply, free from outages (blackouts), voltage dips (brownouts), and voltage spikes and surges.
There may be natural or person-made flood risks from nearby water sources and reservoirs or risks from leaking plumbing or fire suppression systems. Electrical systems need to be shut down immediately in the presence of any significant amount of water.
More water vapor in the air risks condensation forming within a device chassis, leading to corrosion and short circuit faults. Low humidity increases the risks of static charges building up and damaging components.
How is rack height measured?
- In “U” units
- In meters
- In centimeters
- In inches
In “U” units
Which solution does a network closet use to clean a power signal?
- Generator
- PDU
- UPS
- Battery Backup
- PDU
A power distribution unit (PDU) has circuitry to “clean” a power signal and protect against spikes, surges, and brownouts.
An uninterruptible power supply (UPS) can provide a temporary power source in the event of a blackout. UPS runtimes may range from a few minutes to hours. A UPS does not clean a power signal unless it contains PDU elements.
A backup power generator can provide power to a whole building, often for several days. A generator does not clean a power signal unless it contains PDU elements.
A battery backup can provision at the component level, such as for disk drive and RAID array cache. The battery protects any read or write operations cached at the time of power loss.
A network operations engineer is investigating alerts that the data center keeps switching to battery backup.
What environmental factor should the engineer investigate?
- Flooding
- Humidity
- Temperature
- Electrical
- Electrical
Computer systems need a stable power supply, free from outages (blackouts), voltage dips (brownouts), and voltage spikes and surges.
There may be natural or person-made flood risks from nearby water sources and reservoirs or risks from leaking plumbing or fire suppression systems. Electrical systems need to be shut down immediately in the presence of any significant amount of water.
More water vapor in the air risks condensation forming within a device chassis, leading to corrosion and short circuit faults. Low humidity increases the risks of static charges building up and damaging components.
High temperatures make it difficult for device and rack cooling systems to dissipate heat effectively. This increases the risk of overheating components within device chassis and consequent faults.
An installer is cabling a new building and is laying cable in every area of the building that may need a computer or telephone.
What kind of cable is the installer installing?
- Crossover cable
- UTP
- STP
- Fiber Optic
- UTP
Installers often flood-wire modern buildings using unshielded twisted pair (UTP) cabling, which involves laying cable in every location in the building that may need to support a telephone or computer.
Shielded twisted pair (STP) cable is less susceptible to interference and crosstalk and may be a requirement in environments with high interference levels.
Fiber optic cable supports higher bandwidth over longer links than copper cable, and organizations usually use it for local area network backbones rather than connecting end-user devices.
A crossover cable has a T568A terminator at one end and a T568B terminator at the other. This type of cable connects an end system (host) to another host or a hub to a hub.
