Free D-DP-FN-01 sample questions

Correct answer: Semi-synchronous or synchronous with write-folding

While true synchronous replication over 500 km causes performance issues, semi-synchronous mode (or features like write-folding in some platforms) provides a compromise. It acknowledges the host write immediately after it's cached locally, while the replication to the remote site happens in the background. This greatly reduces application latency while still aiming for a near-zero RPO, which is a much better balance for this scenario than pure asynchronous (which can't guarantee zero data loss) or forcing synchronous replication that cripples the application.

Correct answer: Variable-length segment processing

Dell PowerProtect DD (formerly Data Domain) systems use variable-length segment processing for deduplication. This method is highly effective because it is not affected by data shifting, where a small change at the beginning of a file can alter all subsequent fixed-length blocks. By identifying data segments based on content rather than fixed position, it can find more duplicate data, leading to higher deduplication ratios and greater storage efficiency, especially across varied datasets.

Correct answers: A logical air gap (data link severance); Immutable copies using Retention Lock

The logical air gap is a core principle of the Cyber Recovery vault. The replication link between the production environment and the vault is only enabled during the brief data sync window and is disabled the rest of the time. This severs the network path, preventing attackers from moving laterally from the production network to the vault.

Within the vault, backup copies are made immutable using features like Data Domain Retention Lock. This prevents the data from being altered, encrypted, or deleted, even by a privileged administrator, for a defined period. This ensures the integrity of the recovery copies even if an attacker were to somehow gain access to the vault.

Correct answer: False

This statement is false. RAID 0, also known as striping, is designed purely for performance. It writes data across multiple disks simultaneously, increasing read/write speeds. However, it offers no data redundancy or fault tolerance. The failure of a single drive in a RAID 0 array will result in the loss of all data on the array.

Correct answer: Create an automated archiving policy to move data older than 90 days to a lower-cost object storage tier.

An automated archiving policy is the ideal solution. It addresses both key requirements: reducing the load on expensive primary storage by moving inactive data, and minimizing long-term costs by placing that data on a more economical tier (like object storage or a purpose-built archive appliance) suitable for long-term retention. Replication and backup alone do not address the need to free up primary storage space.

Correct answer: No, the definitions for RPO and RTO have been reversed.

The consultant has reversed the definitions. Recovery Point Objective (RPO) relates to data loss and is measured in time (e.g., 15 minutes of data loss). It's the point in time to which data must be recovered. Recovery Time Objective (RTO) relates to downtime and is the target time within which a business process must be restored after a disaster to avoid unacceptable consequences.

Correct answer: Dell Avamar with source-side, global deduplication.

Dell Avamar excels in this scenario because it performs source-side, global deduplication. Before any data is sent across the network, the Avamar client identifies and eliminates redundant data blocks by comparing them against a central repository. For environments with many similar VMs (like VDI), this is extremely effective at reducing the backup data at the source, thus minimizing network traffic and backup windows.

Correct answer: Data transfer egress costs (downloading/retrieving data from the cloud).

While all listed items are costs, data egress charges are the most frequently underestimated. Most cloud providers charge little to nothing for data ingress (uploads) but charge significant fees for data egress (downloads). During a large-scale recovery or DR test, retrieving terabytes of data from the cloud can result in a surprisingly large bill if not properly factored into the total cost of ownership (TCO) analysis.

Correct answer: Active-active clustering

This scenario describes an active-active cluster. All web servers (nodes) are simultaneously active and processing requests distributed by the load balancer. If one server fails, the load balancer redirects traffic to the remaining healthy servers, providing high availability and fault tolerance without a dedicated standby node.

Correct answer: Authentication

Authentication is the process of verifying a user's identity. Multi-factor authentication (MFA) is a strong authentication method that requires two or more verification factors to gain access. Therefore, implementing MFA directly addresses the 'Authentication' component of the AAA (Authentication, Authorization, Accounting) framework.