The management team has mandated the use of data-at-rest encryption on all corporate servers. Using this encryption paradigm will ensure:
Correct Answer:
B
Data-at-rest encryption is a method of encrypting data while it is stored on a storage device, such as a hard drive, an SSD, or a tape library. This ensures that if the data is stolen or lost, it will be unreadable without the encryption key. Data-at-rest encryption does not protect data while it is in transit over the network, in use by the CPU or memory, or attached to an email.
Which of the following documents would be useful when trying to restore IT infrastructure operations after a non-planned interruption?
Correct Answer:
B
A disaster recovery plan would be useful when trying to restore IT infrastructure operations after a non-planned interruption. A disaster recovery plan is a document that outlines the steps and procedures to recover from a major disruption of IT services caused by natural or man-made disasters, such as fire, flood, earthquake, cyberattack, etc. A disaster recovery plan typically includes:
✑ A list of critical IT assets and resources that need to be protected and restored
✑ A list of roles and responsibilities of IT staff and stakeholders involved in the recovery process
✑ A list of backup and recovery strategies and tools for data, applications, servers, networks, etc.
✑ A list of communication channels and methods for notifying users, customers, vendors, etc.
✑ A list of testing and validation methods for ensuring the functionality and integrity of restored systems
✑ A list of metrics and criteria for measuring the effectiveness and efficiency of the recovery process
A disaster recovery plan helps IT organizations to minimize downtime, data loss, and financial impact of a disaster, as well as to resume normal operations as quickly as possible.
Which of the following BEST describes overprovisioning in a virtual server environment?
Correct Answer:
A
This is the best definition of overprovisioning in a virtual server environment because it means allocating more CPU, memory, disk, or network resources to the virtual machines than what is actually available on the physical host. This can lead to performance issues and resource contention.
References:https://www.hpe.com/us/en/insights/articles/10-virtualization-mistakes-everyone-makes-1808.html
A systems administrator needs to configure a new server and external storage for a new production application environment. Based on end-user specifications, the new solution needs to adhere to the following basic requirements:
* 1. The OS must be installed in a separate disk partition. In case of hard drive failure, it cannot be affected.
* 2. Application data IOPS performance is a must.
* 3. Data availability is a high priority, even in the case of multiple hard drive failures.
Which of the following are the BEST options to comply with the user requirements? (Choose three.)
Correct Answer:
BDE
To comply with the user requirements, the best options are to install the OS on a RAID 1 array, configure RAID 5 for the application data, and use SSD hard drives for the data application array. Here is why:
✑ RAID 1 is a mirroring technique that creates an exact copy of data on two disks.
This provides redundancy and fault tolerance in case of hard drive failure. RAID 1 also improves read performance since either disk can be read at the same time. Therefore, installing the OS on a RAID 1 array meets the first requirement of separating the OS from the application data and protecting it from hard drive failure.
✑ RAID 5 is a striping technique with parity that distributes data and parity blocks
across three or more disks. This provides improved performance and storage efficiency compared to RAID 1, as well as fault tolerance in case of a single disk failure. Therefore, configuring RAID 5 for the application data meets the second and third requirements of providing high IOPS performance and data availability.
✑ SSD hard drives are solid-state drives that use flash memory to store data. They
have no moving parts and offer faster read and write speeds, lower latency, and lower power consumption than traditional HDDs. Therefore, using SSD hard drives for the data application array meets the second requirement of providing high IOPS performance.
References:
✑ https://phoenixnap.com/kb/raid-levels-and-types
✑ https://en.wikipedia.org/wiki/Standard_RAID_levels
A new application server has been configured in the cloud to provide access to all clients within the network. On-site users are able to access all resources, but remote users are reporting issues connecting to the new application. The server administrator verifies that all users are configured with the appropriate group memberships. Which of the following is MOST likely causing the issue?
Correct Answer:
C
This is the most likely cause of the issue because firewall rules can block or allow traffic based on source, destination, port, protocol, or other criteria. If the firewall rules are not configured properly, they can prevent remote users from accessing the cloud application server, while allowing on-site users to access it.References:https://docs.microsoft.com/en-us/azure/virtual-network/security-overview
