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ISACA COBIT-2019 Examcollection Vce: COBIT 2019 Foundation - Errandsolutions Precise Question Explanations for your free downloading - Errandsolutions

COBIT-2019

Exam Code: COBIT-2019

Exam Name: COBIT 2019 Foundation

Version: V22.75

Q & A: 580 Questions and Answers

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NEW QUESTION: 1
The Power and Suspend buttons for a virtual machine can be configured from the Options tab of the virtual machine. What are the two default actions that are configured for these buttons? (Choose two.)
A. The Suspend button suspends the VM though ESXi.
B. The Power button does a graceful shutdown.
C. The Suspend button suspends the VM though the guest OS.
D. The Power button does a hard shutdown.
Answer: A,B
Explanation:
Reference: http://pubs.vmware.com/vsphere50/topic/com.vmware.vsphere.vm_admin.doc_50/GUID-62689983-3320-464C-8CAEAA8B528350D7.html

NEW QUESTION: 2
In Microsoft Dynamics AX 2012, which of the following are verified by validating the settings on the Report Server form?
A. The Reporting Server URLs are correct.
B. The Report Manager website is configured.
C. The Help service for Reporting Manager is installed.
D. The Application Object Server (AOS) instance can communicate with the Reporting Services instance.
Answer: C

NEW QUESTION: 3
You are a data engineer. You are designing a Hadoop Distributed File System (HDFS) architecture. You plan to use Microsoft Azure Data Lake as a data storage repository.
You must provision the repository with a resilient data schema. You need to ensure the resiliency of the Azure Data Lake Storage. What should you use? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
COBIT-2019 Accurate Study Material
Answer:
Explanation:
COBIT-2019 Accurate Study Material
Explanation:
Box 1: NameNode
An HDFS cluster consists of a single NameNode, a master server that manages the file system namespace and regulates access to files by clients.
Box 2: DataNode
The DataNodes are responsible for serving read and write requests from the file system's clients.
Box 3: DataNode
The DataNodes perform block creation, deletion, and replication upon instruction from the NameNode.
Note: HDFS has a master/slave architecture. An HDFS cluster consists of a single NameNode, a master server that manages the file system namespace and regulates access to files by clients. In addition, there are a number of DataNodes, usually one per node in the cluster, which manage storage attached to the nodes that they run on. HDFS exposes a file system namespace and allows user data to be stored in files. Internally, a file is split into one or more blocks and these blocks are stored in a set of DataNodes. The NameNode executes file system namespace operations like opening, closing, and renaming files and directories. It also determines the mapping of blocks to DataNodes. The DataNodes are responsible for serving read and write requests from the file system's clients. The DataNodes also perform block creation, deletion, and replication upon instruction from the NameNode.
References:
https://hadoop.apache.org/docs/r1.2.1/hdfs_design.html#NameNode+and+DataNodes

NEW QUESTION: 4
Which of the following terms can be described as the process to conceal data into another file or media in a practice known as security through obscurity?
A. Encryption
B. NTFS ADS
C. Steganography
D. ADS - Alternate Data Streams
Answer: C
Explanation:
It is the art and science of encoding hidden messages in such a way that no one, apart from the sender and intended recipient, suspects the existence of the message or could claim there is a message.
It is a form of security through obscurity.
The word steganography is of Greek origin and means "concealed writing." It combines the Greek words steganos (), meaning "covered or protected," and graphei () meaning "writing."
The first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography and steganography, disguised as a book on magic. Generally, the hidden messages will appear to be (or be part of) something else: images, articles, shopping lists, or some other cover text. For example, the hidden message may be in invisible ink between the visible lines of a private letter.
The advantage of steganography over cryptography alone is that the intended secret message does not attract attention to itself as an object of scrutiny. Plainly visible encrypted messages, no matter how unbreakable, will arouse interest, and may in themselves be incriminating in countries where encryption is illegal. Thus, whereas cryptography is the practice of protecting the contents of a message alone, steganography is concerned with concealing the fact that a secret message is being sent, as well as concealing the contents of the message. It is sometimes referred to as Hiding in Plain Sight. This image of trees blow contains in it another image of a cat using Steganography.
ADS Tree with Cat inside
COBIT-2019 Accurate Study Material
This image below is hidden in the picture of the trees above:
COBIT-2019 Accurate Study Material
Hidden Kitty As explained here the image is hidden by removing all but the two least significant bits of each color component and subsequent normalization.
ABOUT MSF and LSF
One of the common method to perform steganography is by hiding bits within the Least Significant Bits of a media (LSB) or what is sometimes referred to as Slack Space. By modifying only the least significant bit, it is not possible to tell if there is an hidden message or not looking at the picture or the media. If you would change the Most Significant Bits (MSB) then it would be possible to view or detect the changes just by looking at the picture. A person can perceive only up to 6 bits of depth, bit that are changed past the first sixth bit of the color code would be undetectable to a human eye.
If we make use of a high quality digital picture, we could hide six bits of data within each of the pixel of the image. You have a color code for each pixel composed of a Red, Green, and Blue value. The color code is 3 sets of 8 bits each for each of the color. You could change the last two bit to hide your data. See below a color code for one pixel in binary format. The bits below are not real they are just example for illustration purpose:
RED GREEN BLUE 0101 0101 1100 1011 1110 0011 MSB LSB MSB LSB MSB LSB
Let's say that I would like to hide the letter A uppercase within the pixels of the picture. If we convert the letter "A" uppercase to a decimal value it would be number 65 within the ASCII table , in binary format the value 65 would translet to 01000001
You can break the 8 bits of character A uppercase in group of two bits as follow: 01 00 00 01
Using the pixel above we will hide those bits within the last two bits of each of the color as follow:
RED GREEN BLUE 0101 0101 1100 1000 1110 0000 MSB LSB MSB LSB MSB LSB
As you can see above, the last two bits of RED was already set to the proper value of 01, then we move to the GREEN value and we changed the last two bit from 11 to 00, and finally we changed the last two bits of blue to 00. One pixel allowed us to hide 6 bits of data. We would have to use another pixel to hide the remaining two bits.
The following answers are incorrect:
-ADS - Alternate Data Streams: This is almost correct but ADS is different from steganography in that ADS hides data in streams of communications or files while Steganography hides data in a single file.
-Encryption: This is almost correct but Steganography isn't exactly encryption as much as using space in a file to store another file.
-NTFS ADS: This is also almost correct in that you're hiding data where you have space to do so. NTFS, or New Technology File System common on Windows computers has a feature where you can hide files where they're not viewable under normal conditions. Tools are required to uncover the ADS-hidden files.
The following reference(s) was used to create this question: The CCCure Security+ Holistic Tutorial at http://www.cccure.tv and Steganography tool and http://en.wikipedia.org/wiki/Steganography

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