38. A network rack has four servers and four switches with dual power supplies. Only one intelligent PDU is installed in the rack. Which of the following is the reason to add a second PDU?
Answer: A
Power redundancy
Adding a second Power Distribution Unit (PDU) to the network rack ensures power redundancy, which is crucial for maintaining continuous operation in the event of a power supply failure. This setup allows for uninterrupted power delivery to the servers and switches, enhancing the overall reliability of the network infrastructure.
A) Power redundancy
This option is correct because having a second PDU provides an additional power source. In the event that one PDU fails or requires maintenance, the other can take over, thus minimizing downtime and ensuring that all connected devices remain powered.
B) Failed PSU monitoring
While monitoring failed power supply units (PSUs) is important, this option does not justify the need for a second PDU. A single PDU can monitor the PSUs effectively; therefore, adding a second PDU does not directly address failed PSU monitoring.
C) Surge protection
Surge protection is a valuable feature in power management; however, it is not a primary reason for adding a second PDU. PDUs can be equipped with surge protection independently, and simply adding a second unit does not inherently enhance surge protection capabilities.
D) Electricity conservation
Electricity conservation focuses on reducing power consumption rather than enhancing redundancy. Adding a second PDU is unlikely to contribute to electricity conservation; instead, it would provide additional capacity and reliability, which is not the same as conserving energy.
Conclusion
The correct answer is power redundancy, as it directly addresses the need for maintaining continuous power supply in a network setup. All other options either do not justify the addition of a second PDU or relate to different aspects of power management that do not enhance reliability in the same way. Therefore, adding a second PDU is primarily about ensuring that power remains available, even in the event of a failure.