Exam CISSP topic 1 question 10 discussion

D is the only answer choice that makes sense with the excess data

"D" it is. Data deduplication is a process that eliminates excessive copies of data and significantly decreases storage capacity requirements. Deduplication can be run as an inline process as the data is being written into the storage system and/or as a background process to eliminate duplicates after the data is written to disk. https://www.netapp.com/data-management/what-is-data-deduplication/#:~:text=Data%20deduplication%20is%20a%20process,data%20is%20written%20to%20disk.

D is correct answer. Redundant can mean multiple (think redundant systems) so if you have multiple versions of the data then dedup would reduce these copies to one main and multiple stubs. Yes there would be a hit on CPU performance once dedup is run for the first time, however long term this speeds up space saving when new (redundant) data is added. Compression would reference each redundant bit/byte and have pointers to each, filling up the master index record and adding processing overhead each time data was added, searched for or retrieved.

Assuming you have a very large file on your desktop and is occupying much storage space, you can zip up the folder and the size of the file will reduce. What dose that mean? you are compressing the file. That same logic can be applied to this quest. Thus, the correct and is A. Compression

D is the best answer Deduplication is the best solution for managing excess data, even if it's not just duplicates. It helps remove redundant and unneeded data efficiently.

Deduplication doesnt address unusable data.. so it has to be compression, A

D is pretty much the "text book" answer for this question.

Deduplication is effective in organizations that have a lot of redundant data, such as backup systems that have several versions of the same file. Compression is effective in decreasing the size of unique files, such as images, videos, and databases

Deduplication is effective in organizations that have a lot of redundant data, such as backup systems that have several versions of the same file. Compression is effective in decreasing the size of unique files, such as images, videos, and databases

I say the answer is A. The question isn't talking about getting rid of the data, and 9 times out of 10, no one is going to go through large amounts of data to see what's a duplicate. Not to mention, you wouldn't know what to keep or delete. A "Compression" is the simplest answer.

D is the answer. Although both A and D answer look similar. This is simple explanation for both answers. A storage area network (SAN) or storage network is a computer network which provides access to consolidated, block-level data storage. deduplication commonly occurs at the block level; however, compression generally occurs at the file level. Now the difference is that deduplication occurs at the block level according to the question while compression occurs at the file level. so answer is Deduplication.

D, as question states large amount of redundant data, hence deduplication.

D is right

Answer A) Compression will address ALL data stored on SAN. I thought D at first too...but we don't know how much of the data is actually duplicated....it may only be 1% of all of the data and won't make a difference compared to compression of ALL of the data.

A, the reason is that deduplication is NOT secure. "In some instances, a SAN may implement deduplication in order to save space by not retaining multiple copies of the same file. However, this can sometimes result in data loss if the one retained original is corrupted." - (ISC)2 CISSP Certified Information Systems Security Professional Official Study Guide, 9th Edition, Chapter 11 - Converged Protocols - Storage Area Network (SAN)

D is the answer. It's Deduplication. Deduplication refers to a method of eliminating a dataset's redundant data. In a secure data deduplication process, a deduplication assessment tool identifies extra copies of data and deletes them, so a single instance can then be stored. Data deduplication software analyzes data to identify duplicate byte patterns.

Compression (option A) reduces the size of data by encoding it in a more compact form, but it may not effectively address the issue of redundant data. It's D