Exam 220-1102 topic 1 question 27 discussion

I think it is B because it specifically states "storage space is a concern" and GFS is storage heavy. Also only a few files are modified frequently, so differential is the best for that.

Its Offsite and here's why. Yes storage space is a concern. However, offsite backups generally dont mean you get another data center and use it for backups. In most cases, offsite refers to the cloud. For a ransomware target, its getting more common for them to infect the whole network, and its likely backups will be affected as well. Cloud storage is also very cheap if you only need to backup a few files. GFS has offsite backups, but at least some are on site, and that's more prone to ransomware and uses more storage (Otherwise whats the point of the generations?) Differential backups and full backups dont protect against ransomware in any particular way, so they dont address all the concerns, especially since they arent backup methods, but instead types of backups.

You cannot have a Differential without a Full... Diff saves no space over the other choices. And differential is less space efficient than Incremental. This should be D. Grandfather-father-son is the industry standard in backup methodology. Been doing backups for 20~ years...

B.Differential Backup: This method backs up only the data that has changed since the last full backup. Since only a few files are modified regularly, differential backups can significantly reduce the amount of data stored compared to full backups while still ensuring that you have recent copies of modified files. This approach also allows for quicker restoration times because you only need the last full backup and the latest differential backup to restore the system. NOT Off-site. While off-site backups are crucial for disaster recovery and protection against local threats (including ransomware), the option does not specify a backup method. It is also more about where the backups are stored rather than how they are made.

Off-site is not a backup METHOD, it's a location. The only METHODS are full and differential, and differential uses less storage. Please read the questions carefully before overthinking them.

I disagree with the majority. I think the answer is C The question has two concerns: Ransomware attacks & File size. The question does state they they only back up a few files; but they still specifically stated that storage space is a concern. If it were incremental instead of differential I would be more inclined to think that was the answer, but I think differential doesn't meet the concern of minimizing file size. Also, GFS is very file heavy so that's out. In regard to Ransomware attacks, I think that B, C, and D cover that issue adequaitely. So we're left with B or C; and I still think that C addresses the file size concern, where B does not.

I'm going with offsite. There is another option that would clear this up, but CompTIA likes have 2 answers this close. A good answer is Differential. A better answer is Offsiet. The BEST answer is Offsite Differential. Therefore, I believe it's offsite.

Differential backups only backup files that have been modified or added since the last full backup. This method reduces the storage space used and offers protection against ransomware attacks, as it allows for full system restoration without the need to access recent versions of potentially infected files

Differential backups are a good choice for mitigating ransomware attacks and addressing the specified concerns because they only back up the files that have changed since the last full backup. This means that they are efficient in terms of storage space as they do not require the storage of duplicate data. In the event of a ransomware attack, you can restore to the last full backup and then apply the most recent differential backup to recover the changed files.

B. Differential Differential backups are a good choice for mitigating ransomware attacks and addressing the specified concerns because they only back up the files that have changed since the last full backup. This means that they are efficient in terms of storage space as they do not require the storage of duplicate data. In the event of a ransomware attack, you can restore to the last full backup and then apply the most recent differential backup to recover the changed files. Full backups (Option A) store all the data, which can consume a lot of storage space over time. Off-site backups (Option C) are important for disaster recovery but do not specifically address the concerns related to ransomware mitigation. Grandfather-father-son (Option D) is a retention policy for managing multiple backup sets over time but doesn't inherently mitigate ransomware attacks.

I disagree with the majority of people here, I think it's off-site, because the best backup solution for ransomware is stored off-site.

B. Differential backup method would be the best backup method that would best address these concerns. Differential backups only back up files that have been modified since the last full backup, which means only a few files that are regularly modified will be backed up. This minimizes the backup size and storage space needed, while still ensuring that recent modifications are backed up in the event of a ransomware attack. Additionally, differential backups can help mitigate the risk of data loss from ransomware attacks because they only backup modified files, reducing the chances of backing up encrypted files. Full backups would be too large for the amount of data being regularly modified, while off-site and grandfather-father-son backup methods do not address the specific concerns about backup size and ransomware mitigation.

A differential backup backs up all the files that have been modified since the last full backup. This method saves storage space compared to full backups, as it only backs up the changes made. This option provides a balance between storage space usage and protection against ransomware attacks. Off-site backup refers to the physical location of the backup storage, not the backup method itself. While it's a good practice to store backups off-site to protect against disasters, it doesn't directly address the storage space concern mentioned in the scenario. Grandfather-father-son is a backup rotation scheme rather than a backup method

A differential backup method would be the BEST option in this scenario. Differential backup takes a full backup of the system initially and then backs up only the changes that have been made since the last full backup. This method saves both time and storage space compared to a full backup. Additionally, differential backups provide an advantage in the event of a ransomware attack as only the changes made after the last full backup will be affected, making it easier to restore the unencrypted data. Off-site and grandfather-father-son backup methods refer to the storage location and backup rotation schedule, respectively, and are not directly related to mitigating ransomware attacks.

differential backup will be smaller than a full backup of the entire system, as it only captures changes and not the entire system.

there are only three types..full, incremental & differential

B is incorrect. The differential backups will contain an increasing amount of data which may exhaust the storage space. Grandfather-father-son backup method would be a more efficient solution in this scenario because it uses a rolling window of backups, allowing only a certain number of backups to be kept at any given time, which can help with storage space concerns. Therefore answer is D.