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NEW QUESTION: 1
Which of the following method is recommended by security professional to PERMANENTLY erase sensitive data on magnetic media?
A. Degaussing
B. Format magnetic media
C. Delete File allocation table
D. Overwrite every sector of magnetic media with pattern of 1's and 0's
Answer: A
Explanation:
Explanation/Reference:
Explanation:
Degaussing is the most effective method out of all the provided choices to erase sensitive data on magnetic media.
A device that performs degaussing generates a coercive magnetic force that reduces the magnetic flux density of the storage media to zero. This magnetic force is what properly erases data from media. Data are stored on magnetic media by the representation of the polarization of the atoms. Degaussing changes this polarization (magnetic alignment) by using a type of large magnet to bring it back to its original flux (magnetic alignment).
Simply deleting files or formatting the media does not actually remove the information. File deletion and media formatting often simply remove the pointers to the information.
Specialized hardware devices known as degaussers can be used to erase data saved to magnetic media.
The measure of the amount of energy needed to reduce the magnetic field on the media to zero is known as coercivity. It is important to make sure that the coercivity of the degausser is of sufficient strength to meet object reuse requirements when erasing data. If a degausser is used with insufficient coercivity, then a remanence of the data will exist.
Remanence is the measure of the existing magnetic field on the media; it is the residue that remains after an object is degaussed or written over. Data is still recoverable even when the remanence is small. While data remanence exists, there is no assurance of safe object reuse. Some degaussers can destroy drives.
The security professional should exercise caution when recommending or using degaussers on media for reuse.
Incorrect Answers:
B: Software tools also exist that can provide object reuse assurance. These tools overwrite every sector of magnetic media with a random or predetermined bit pattern. Overwrite methods are effective for all forms of electronic media with the exception of read-only optical media. There is a drawback to using overwrite software. During normal write operations with magnetic media, the head of the drive moves back-and-forth across the media as data is written. The track of the head does not usually follow the exact path each time.
The result is a miniscule amount of data remanence with each pass. With specialized equipment, it is possible to read data that has been overwritten. Degaussing is more effective than overwriting the sectors.
C: Simply deleting files or formatting the media does not actually remove the information. File deletion and media formatting often simply removes the pointers to the information.
D: Deleting the File allocation table will not erase all data. The data can be recoverable using software tools.
NEW QUESTION: 2
Click the exhibit button.
If router R2 redistributes the IS-IS route to 192.168.3.0/24 into OSPF, router R3 will receive two routes to
192.168.3.0/24. What will be the preference of these two routes? Assume that all IS-IS routers are L1/L2 capable and are in the same area. Choose two answers.
A. The IS-IS Level 1 external preference
B. The OSPF internal preference
C. The OSPF external preference
D. The IS-IS Level 1 internal preference
E. The IS-IS Level 2 internal preference
F. The IS-IS Level 2 external preference
Answer: C,D
NEW QUESTION: 3
You have an Apache Hive cluster in Microsoft Azure HDInsight. The cluster contains 10 million data files.
You plan to archive the data.
The data will be analyzed monthly.
You need to recommend a solution to move and store the data. The solution must minimize how long it takes to move the data and must minimize costs.
Which two services should you include in the recommendation? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.
A. Azure Data Factory
B. Microsoft SQL Server Integration Services (SSIS)
C. Azure Table Storage
D. Azure Data Lake
E. Azure Queue storage
Answer: A,D
Explanation:
Explanation
D: To analyze data in HDInsight cluster, you can store the data either in Azure Storage, Azure Data Lake Storage Gen 1/Azure Data Lake Storage Gen 2, or both. Both storage options enable you to safely delete HDInsight clusters that are used for computation without losing user data.
E: The Spark activity in a Data Factory pipeline executes a Spark program on your own or on-demand HDInsight cluster. It handles data transformation and the supported transformation activities.
References:
https://docs.microsoft.com/en-us/azure/hdinsight/hdinsight-hadoop-use-data-lake-store
https://docs.microsoft.com/en-us/azure/data-factory/transform-data-using-spark
NEW QUESTION: 4
>NMAP -sn 192.168.11.200-215 The NMAP command above performs which of the following?
A. A port scan
B. A trace sweep
C. An operating system detect
D. A ping scan
Answer: D