D-ISM-FN-01 Dell Information Storage and Management Foundations v2 Exam Questions and Answers

5Grepresents the fifth generation of mobile networks and offers several significant advantages over 4G, 3G, and earlier generations:

Increased speed:5G delivers data speeds up to 100 times faster than 4G LTE.

Enhanced capacity:Supports more devices per square kilometer, crucial for IoT and smart cities.

Low latency:Reduces delay in data transmission, enabling real-time applications like remote surgeries or autonomous vehicles.

Increased bandwidth(Option B) is part of the overall increased capacity.

Reduced distance(Option C) is incorrect; 5G uses shorter wavelengths, meaning shorter range.

Lower cost(Option D) is not a key advantage of 5G technology itself.

In continuous data protection (CDP), journal space stores all the changes made to data over time. The amount of journal space determines the retention window, i.e., how far back in time data can be recovered. A larger journal allows for a longer recovery window.

Amount of space the source and replica volumes require:Relates to storage capacity, not recovery time.

Length of time required to recover the data:Depends on system performance and data size.

Amount of data that can be restored to a specific point:Depends on the changes captured in the journal.

In traditional storage provisioning, the RAID configuration significantly impacts the storage system's characteristics:

RAID Level: Determines data redundancy and fault tolerance. For example, RAID 1 mirrors data, providing high availability, while RAID 5 uses parity, balancing performance and redundancy.

Number of Drives: Affects both capacity and performance. More drives can increase total storage capacity and improve performance through parallel data access.

Make of Drives: While drive quality matters, it's less influential than RAID configuration in determining overall system characteristics.

Capacity of Drives: Impacts total storage size but doesn't directly influence performance or availability as significantly as RAID level and drive count.

Remote data protection and recovery solutions, like replication and cloud-based backup, are primarily designed to ensuremaximum application and information availability. They protect data in the event of:

Local failures(disk, server, or site outages)

Natural disasters(floods, fires)

Ransomware attacks

By having off-site copies and failover options, businesses maintain continuous access to critical data.

FCIP(Fibre Channel over IP) encapsulatesFibre Channel framesinto IP packets and tunnels them over IP networks. This enables remote SAN connectivity across IP-based WANs while preserving FC protocols.

Over Ethernetis inaccurate because FCIP uses IP-level transport (Layer 3), not just Layer 2.

Splitting LAN and FC SAN datais irrelevant to the tunneling mechanism.

Separating LAN/SAN dataalso misses the encapsulation focus.

Dell RecoverPoint is a continuous data protection (CDP) solution that uses journaling to provideany point-in-time recoveryof data. It continuously captures and replicates data changes, storing them in a journal to enable precise recovery to any required point in the past.

Dell SRDF (Symmetrix Remote Data Facility):Provides synchronous/asynchronous replication, not CDP.

Dell TimeFinder SnapVX:Creates point-in-time snapshots but doesn’t offer continuous journaling.

Dell Cloud Tier:Used for archiving older data to the cloud.

In Ethernet networking, VLANs (Virtual Local Area Networks) are identified using a 12-bit VLAN ID field in the IEEE 802.1Q standard. Since 12 bits can represent 2¹² = 4096 unique values, the maximum number of VLANs that can be supported is 4096.

1024 and 2048: These values are less than the maximum and represent subsets of possible VLANs.

8192: This exceeds the 12-bit limit and is not supported by the standard.

Anincidentis anunplanned disruptionof a service or a reduction in its quality, often with anunknown root cause.

Incidents require immediate action to restore service.

Example: SAN switch port down, unexpected storage latency.

Support requestsare typically service requests, not incidents.

Impact actionsare more about changes, not incidents.

Events preventing correctionsmight be problems, not incidents.

AnIDPS (Intrusion Detection and Prevention System)monitors network traffic and system activities for signs of malicious activity and policy violations. It canidentify and blocksecurity threats in real-time.

Antivirus software:Focuses on detecting/removing malware, not broader vulnerabilities.

Password encryption:Secures credentials but does not identify vulnerabilities.

IAM:Manages access but does not detect attacks.

IP packet segmentationcan cause replication performance issues over the WAN.

Since FCIP tunnels FC frames over IP networks, if the IP packet size exceeds the MTU, packets are fragmented and reassembled, increasing latency.

TE_Port modeis used for trunking, not related to packet fragmentation.

EX_Port modeis used for inter-switch connectivity (FCR).

Ethernet frame segmentationis not relevant in FCIP tunneling.

Rapid elasticity is a cloud computing characteristic that allows resources to be scaled up or down quickly and automatically, depending on demand. In the scenario of a sudden traffic surge, rapid elasticity enables the infrastructure to handle increased loads without manual intervention.

Measured service:Refers to monitoring and billing based on resource usage.

On-demand self-service:Allows users to provision resources as needed.

Resource pooling:Involves sharing resources among multiple users.

Data deduplication is a technique that eliminates redundant copies of data, storing only unique instances. When multiple copies of the same data are found, deduplication replaces them with references to a single stored copy, significantly reducing storage requirements.

Data replication:Involves copying data to another location for redundancy, not reducing storage size.

Data encryption:Secures data but doesn't affect storage size.

Data compression:Reduces data size by encoding information more efficiently but doesn't eliminate duplicates.

Inwrite-through caching, data is written simultaneously to both the cache and the underlying disk. This ensures data integrity because the write is not acknowledged until it’s safely written to the disk.

Write-backcaching offers reduced latency but increases risk of data loss if cache is lost.

Write-throughtrades speed for security, offeringenhanced data securityand reducing the risk of data loss during power failures.

Total operational hours required: 12 hours/day × 5 days = 60 hours

Total downtime during required hours:

Monday: 2 hours

Wednesday: 1 hour (only 5 PM to 6 PM counts)

ACDP appliancesits in the data path and:

Intercepts all writesto the production volume.

Splits each write into two copies: one goes to the production volume, the other to the replica volume.

Maintains a journal for point-in-time recovery.

Option A/B/C: These are aspects of replication, but CDP’s primary function is real-time interception and splitting of writes.