Explanation:

Reference:
https://docs.microsoft.com/en-us/azure/sentinel/extend-sentinel-across-workspaces-tenants
Topic 1, Contoso Ltd
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 Next 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 requirements, 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 Question button to return to the question.
Overview
A company named Contoso Ltd. has a main office and five branch offices located throughout North America.
The main office is in Seattle. The branch offices are in Toronto, Miami, Houston, Los Angeles, and Vancouver.
Contoso has a subsidiary named Fabrikam, Ltd. that has offices in New York and San Francisco.
Existing Environment
End-User Environment
All users at Contoso use Windows 10 devices. Each user is licensed for Microsoft 365. In addition, iOS devices are distributed to the members of the sales team at Contoso.
Cloud and Hybrid Infrastructure
All Contoso applications are deployed to Azure.
You enable Microsoft Cloud App Security.
Contoso and Fabrikam have different Azure Active Directory (Azure AD) tenants. Fabrikam recently purchased an Azure subscription and enabled Azure Defender for all supported resource types.
Current Problems
The security team at Contoso receives a large number of cybersecurity alerts. The security team spends too much time identifying which cybersecurity alerts are legitimate threats, and which are not.
The Contoso sales team uses only iOS devices. The sales team members exchange files with customers by using a variety of third-party tools. In the past, the sales team experienced various attacks on their devices.
The marketing team at Contoso has several Microsoft SharePoint Online sites for collaborating with external vendors. The marketing team has had several incidents in which vendors uploaded files that contain malware.
The executive team at Contoso suspects a security breach. The executive team requests that you identify which files had more than five activities during the past 48 hours, including data access, download, or deletion for Microsoft Cloud App Security-protected applications.
Requirements
Planned Changes
Contoso plans to integrate the security operations of both companies and manage all security operations centrally.
Technical Requirements
Contoso identifies the following technical requirements:
* Receive alerts if an Azure virtual machine is under brute force attack.
* Use Azure Sentinel to reduce organizational risk by rapidly remediating active attacks on the environment.
* Implement Azure Sentinel queries that correlate data across the Azure AD tenants of Contoso and Fabrikam.
* Develop a procedure to remediate Azure Defender for Key Vault alerts for Fabrikam in case of external attackers and a potential compromise of its own Azure AD applications.
* Identify all cases of users who failed to sign in to an Azure resource for the first time from a given country. A junior security administrator provides you with the following incomplete query.
BehaviorAnalytics
| where ActivityType == "FailedLogOn"
| where ________ == True

Reference:
https://docs.microsoft.com/en-us/azure/sentinel/notebooks

Explanation:
Box 1: Turn on Live Response
Live response is a capability that gives you instantaneous access to a device by using a remote shell connection. This gives you the power to do in-depth investigative work and take immediate response actions.
Box: 2 : Add a network assessment job
Network assessment jobs allow you to choose network devices to be scanned regularly and added to the device inventory.
Reference:
https://docs.microsoft.com/en-us/microsoft-365/security/defender-endpoint/respond-machine-alerts?
view=o365-worldwide
https://docs.microsoft.com/en-us/microsoft-365/security/defender-endpoint/network-devices?view=o365- worldwide

Reference:
https://docs.microsoft.com/en-us/azure/defender-for-cloud/quickstart-onboard-machines?pivots=azure-arc