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An operations team is documenting standard data center maintenance procedures. They state that regularly rotating and testing backup batteries in a UPS system is unnecessary once the UPS has passed its initial installation test, since UPS batteries do not degrade under normal data center conditions.
This statement is false. UPS batteries degrade over time due to factors such as heat, charge cycles, and age, and therefore require regular testing, maintenance, and periodic replacement to ensure they will perform reliably during an actual power event. Relying solely on the initial installation test is a poor practice and increases the risk of failure during a real outage.
A new hire in an Oracle data center is reviewing the physical security controls used to protect server rooms containing customer data. The facility uses badge access, biometric scanners, mantraps, and security cameras layered together rather than relying on a single control. This overall security approach is best described as which of the following?
Defense in depth refers to layering multiple, independent security controls (physical or logical) so that if one control fails or is bypassed, additional layers still provide protection. Badge access, biometrics, mantraps, and cameras together represent this layered approach. A single point of failure design is the opposite concept. Perimeter-only security relies on just the outer boundary. Zero trust networking is a logical/network security model, not a physical security control strategy.
A data center facility uses an uninterruptible power supply (UPS) system combined with a diesel generator to protect against power outages. During a utility power failure, the UPS provides power almost instantaneously while the generator takes longer to start and stabilize. What is the primary role of the UPS in this configuration?
The UPS is designed to provide immediate, short-term power (typically minutes) to critical loads during the transition period after utility power is lost and before the generator starts and stabilizes. It is not intended for long-duration power support, which is the generator's role. UPS systems do not replace generators in most enterprise data centers, and they do not provide cooling functions.
An Oracle Cloud Infrastructure (OCI) data center operations team needs to physically connect a newly racked server to the top-of-rack switch using a cable rated for high-speed, short-distance copper connections within the same rack. Which cable type is most appropriate for this scenario?
Direct Attach Copper (DAC) cables are commonly used in data centers for short-distance, high-speed connections between servers and top-of-rack switches because they are cost-effective and provide low latency over short runs. Single-mode fiber is typically used for longer distances between racks or rooms. RS-232 is a legacy serial console interface, not used for high-speed data links. Coaxial television cable is not used for server-to-switch networking in data centers.
A data center technician is preparing to install a new rack of servers and needs to ensure proper airflow management to prevent hot air from mixing with cool air being supplied to equipment intakes. Which practice best achieves this goal?
Hot aisle/cold aisle containment, combined with blanking panels to close unused rack unit spaces, prevents cold supply air and hot exhaust air from mixing, which improves cooling efficiency and reduces the risk of equipment overheating. Facing intakes toward adjacent exhausts would cause hot air recirculation. Removing blanking panels increases air mixing rather than reducing it. Extremely low humidity increases the risk of electrostatic discharge damage to equipment.
