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NEW QUESTION: 1
Your company has a Microsoft 365 subscription.
The company uses Microsoft Teams.
You need to ensure that only Microsoft apps can be used in Microsoft Teams.
What should you do from the Microsoft Teams admin center?
A. From the global app permission policy, enable the Allow All Apps setting for Microsoft apps.
B. From the Org-wide app settings, disable the Allow third party or custom apps setting.
C. From the Org-wide app settings, disable the Allow interaction with custom apps setting.
D. From the global app setup policy, disable the Upload custom apps setting.
Answer: C
Explanation:
Reference:
https://docs.microsoft.com/en-us/microsoftteams/teams-custom-app-policies-and-settings
Topic 1, Litware, inc
Case study
This is a case study. Case studies are not timed separately. You can use as much exam time as you would like to complete each case. However, there may be additional case studies and sections on this exam. You must manage your time to ensure that you are able to complete all questions included on this exam in the time provided.
To answer the questions included in a case study, you will need to reference information that is provided in the case study. Case studies might contain exhibits and other resources that provide more information about the scenario that is described in the case study. Each question is independent of the other questions in this case study.
At the end of this case study, a review screen will appear. This screen allows you to review your answers and to make changes before you move to the next section of the exam. After you begin a new section, you cannot return to this section.
To start the case study
To display the first question in this case study, click the button. Use the buttons in the left pane to explore the content of the case study before you answer the questions. Clicking these buttons displays information such as business requirement, existing environment, and problem statements. If the case study has an All Information tab, note that the information displayed is identical to the information displayed on the subsequent tabs. When you are ready to answer a question, click the button to return to the question.
Overview
General overview
Litware, Inc. is an international manufacturing company that has 4,000 users. The company has the following four departments:
* IT
* HR
* R&D
* Sales
Physical locations
Litware has two main offices. The offices are located in New York and London.
All offices connect to each other by using a WAN link. Each office connects directly to the Internet.
Existing environment
All user accounts have an Azure Active Directory Premium Plan P1 license.
Litware has a Microsoft 365 subscription that has Office 365 Enterprise E3 licenses for all users. All the E3 products and services are enabled for each user.
Litware uses Microsoft Skype for Business Online.
Requirements
Planned Upgrade
Litware identifies the following requirements for a planned upgrade from Skype for Business Online to Microsoft Teams:
* Provide high quality audio, video, and online meeting experience for Microsoft Teams end users.
* Implement a data retention solution in Microsoft Teams.
* Minimize costs and administrative effort.
* Use the principle of least privilege.
For the sales department, Litware plans to create a team that dynamically updates its membership when users leave and join the department.
Department Upgrade Requirements
Litware plans to implement upgrade requirements for the departments as shown in the following table.
Microsoft Teams Requirements
All teams must meet the following requirements:
* Only users in a partner company that uses a domain named fabrikam.com must be able to collaborate in teams by using guest accounts.
* Only users in the compliance department of Litware must be able to create teams.
Planned Network Tasks
Litware identifies the following network validation tasks:
* An administrator named Admin5 must be able to review the required bandwidth to support audio conferencing, video conferencing, and screen sharing in Microsoft Teams.
* An administrator named Admin6 must be able to review network issues that cause poor call quality reported by users.
Data Retention Requirements
Litware identifies the following data retention requirements:
* Requirement1: All messages in team collaborations must be deleted after seven years.
* Requirement2: all files used in team collaborations must be retained for five years.
* Requirement3: All files used in personal chats must be retained for five years.
Device Requirements
You provide Microsoft Teams-certified IP phones to users in the IT and R&D departments. Each device must meet the following requirements:
* The time zone on the phones used by the R&D department must be set to UTC-8.
* The time zone on the phones used by the IT department must be set to UTC-5.
* All phones must lock automatically after 60 seconds of inactivity.
Voice Pilot Requirements
Litware wants to pilot Phone System as a calling solution for 20 IT department users. The pilot project will receive phone numbers from Microsoft Teams.
Collaboration and Meeting Requirements
Litware identifies the following collaboration and meeting requirements:
* Cloud recording must be disabled for all Microsoft Teams meetings organized by users in the HR departments only.
* Meeting email invitations must be customized to include the Logo URL, Legal URL, and Help URL of Litware.
NEW QUESTION: 2
What access control scheme uses fine-grained rules to specify the conditions under which access to each data item or applications is granted?
A. Role Based Access Control (RBAC)
B. Discretionary Access Control (DAC)
C. Attribute Based Access Control (ABAC)
D. Mandatory Access Control (MAC)
Answer: C
Explanation:
Reference: https://en.wikipedia.org/wiki/Attribute-based_access_control
NEW QUESTION: 3
A. Option D
B. Option A
C. Option B
D. Option C
Answer: C
NEW QUESTION: 4
The primary purpose for using one-way hashing of user passwords within a password file is which of the following?
A. It prevents an unauthorized person from reading the password.
B. It prevents an unauthorized person from trying multiple passwords in one logon attempt.
C. It minimizes the amount of processing time used for encrypting passwords.
D. It minimizes the amount of storage required for user passwords.
Answer: A
Explanation:
Explanation/Reference:
The whole idea behind a one-way hash is that it should be just that - one-way. In other words, an attacker should not be able to figure out your password from the hashed version of that password in any mathematically feasible way (or within any reasonable length of time).
Password Hashing and Encryption
In most situations , if an attacker sniffs your password from the network wire, she still has some work to do before she actually knows your password value because most systems hash the password with a hashing algorithm, commonly MD4 or MD5, to ensure passwords are not sent in cleartext.
Although some people think the world is run by Microsoft, other types of operating systems are out there, such as Unix and Linux. These systems do not use registries and SAM databases, but contain their user passwords in a file cleverly called "shadow." Now, this shadow file does not contain passwords in cleartext; instead, your password is run through a hashing algorithm, and the resulting value is stored in this file.
Unixtype systems zest things up by using salts in this process. Salts are random values added to the encryption process to add more complexity and randomness. The more randomness entered into the encryption process, the harder it is for the bad guy to decrypt and uncover your password. The use of a salt means that the same password can be encrypted into several thousand different formats. This makes it much more difficult for an attacker to uncover the right format for your system.
Password Cracking tools
Note that the use of one-way hashes for passwords does not prevent password crackers from guessing passwords. A password cracker runs a plain-text string through the same one-way hash algorithm used by the system to generate a hash, then compares that generated has with the one stored on the system. If they match, the password cracker has guessed your password.
This is very much the same process used to authenticate you to a system via a password. When you type your username and password, the system hashes the password you typed and compares that generated hash against the one stored on the system - if they match, you are authenticated.
Pre-Computed password tables exists today and they allow you to crack passwords on Lan Manager (LM) within a VERY short period of time through the use of Rainbow Tables. A Rainbow Table is a precomputed table for reversing cryptographic hash functions, usually for cracking password hashes.
Tables are usually used in recovering a plaintext password up to a certain length consisting of a limited set of characters. It is a practical example of a space/time trade-off also called a Time-Memory trade off, using more computer processing time at the cost of less storage when calculating a hash on every attempt, or less processing time and more storage when compared to a simple lookup table with one entry per hash.
Use of a key derivation function that employs a salt makes this attack unfeasible.
You may want to review "Rainbow Tables" at the links:
http://en.wikipedia.org/wiki/Rainbow_table
http://www.antsight.com/zsl/rainbowcrack/
Today's password crackers:
Meet oclHashcat. They are GPGPU-based multi-hash cracker using a brute-force attack (implemented as mask attack), combinator attack, dictionary attack, hybrid attack, mask attack, and rule-based attack.
This GPU cracker is a fusioned version of oclHashcat-plus and oclHashcat-lite, both very well-known suites at that time, but now deprecated. There also existed a now very old oclHashcat GPU cracker that was replaced w/ plus and lite, which - as said - were then merged into oclHashcat 1.00 again.
This cracker can crack Hashes of NTLM Version 2 up to 8 characters in less than a few hours. It is definitively a game changer. It can try hundreds of billions of tries per seconds on a very large cluster of GPU's. It supports up to 128 Video Cards at once.
I am stuck using Password what can I do to better protect myself?
You could look at safer alternative such as Bcrypt, PBKDF2, and Scrypt.
bcrypt is a key derivation function for passwords designed by Niels Provos and David Mazières, based on the Blowfish cipher, and presented at USENIX in 1999. Besides incorporating a salt to protect against rainbow table attacks, bcrypt is an adaptive function: over time, the iteration count can be increased to make it slower, so it remains resistant to brute-force search attacks even with increasing computation power.
In cryptography, scrypt is a password-based key derivation function created by Colin Percival, originally for the Tarsnap online backup service. The algorithm was specifically designed to make it costly to perform large-scale custom hardware attacks by requiring large amounts of memory. In 2012, the scrypt algorithm was published by the IETF as an Internet Draft, intended to become an informational RFC, which has since expired. A simplified version of scrypt is used as a proof-of-work scheme by a number of cryptocurrencies, such as Litecoin and Dogecoin.
PBKDF2 (Password-Based Key Derivation Function 2) is a key derivation function that is part of RSA Laboratories' Public-Key Cryptography Standards (PKCS) series, specifically PKCS #5 v2.0, also published as Internet Engineering Task Force's RFC 2898. It replaces an earlier standard, PBKDF1, which could only produce derived keys up to 160 bits long.
PBKDF2 applies a pseudorandom function, such as a cryptographic hash, cipher, or HMAC to the input password or passphrase along with a salt value and repeats the process many times to produce a derived key, which can then be used as a cryptographic key in subsequent operations. The added computational work makes password cracking much more difficult, and is known as key stretching. When the standard was written in 2000, the recommended minimum number of iterations was 1000, but the parameter is intended to be increased over time as CPU speeds increase. Having a salt added to the password reduces the ability to use precomputed hashes (rainbow tables) for attacks, and means that multiple passwords have to be tested individually, not all at once. The standard recommends a salt length of at least 64 bits.
The other answers are incorrect:
"It prevents an unauthorized person from trying multiple passwords in one logon attempt." is incorrect because the fact that a password has been hashed does not prevent this type of brute force password guessing attempt.
"It minimizes the amount of storage required for user passwords" is incorrect because hash algorithms always generate the same number of bits, regardless of the length of the input. Therefore, even short passwords will still result in a longer hash and not minimize storage requirements.
"It minimizes the amount of processing time used for encrypting passwords" is incorrect because the processing time to encrypt a password would be basically the same required to produce a one-way has of the same password.
Reference(s) used for this question:
http://en.wikipedia.org/wiki/PBKDF2
http://en.wikipedia.org/wiki/Scrypt
http://en.wikipedia.org/wiki/Bcrypt
Harris, Shon (2012-10-18). CISSP All-in-One Exam Guide, 6th Edition (p. 195) . McGraw-Hill. Kindle Edition.
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