Collect and Analyze Security Events from Azure Active Directory

A

The correct answer for this question is A. Azure Sentinel.

Explanation:

Azure Sentinel is a cloud-native security information and event management (SIEM) solution that uses built-in AI and machine learning to detect, investigate, and respond to threats across your organization's entire hybrid estate. Azure Sentinel provides a central location to collect security events from multiple sources, including Azure AD, and automatically analyzes them to identify potential threats.

Azure Synapse Analytics is a cloud-based analytics service that brings together big data and data warehousing, and it's mainly used for data integration, exploration, and data warehousing. It is not designed for security event management.

Azure AD Connect is a tool used to synchronize on-premises Active Directory objects with Azure AD. While it may be used in some security-related tasks, it is not intended for security event management.

Azure Key Vault is a cloud-based service that allows you to safeguard and control cryptographic keys and other secrets used by cloud applications and services. It is not a security event management solution.

Therefore, Azure Sentinel is the correct answer if you need to collect and automatically analyze security events from Azure Active Directory.

To ensure high availability of virtual machines (VMs) in Azure, you should use availability sets or availability zones.

Availability sets are a feature that allows you to group VMs in a way that makes them more fault-tolerant. An availability set is a logical grouping of VMs that are deployed across multiple physical servers in a datacenter. By spreading your VMs across multiple physical servers, you can ensure that if one server fails, your service will still be available. When you create an availability set, Azure ensures that the VMs are deployed to different fault domains and update domains. Fault domains are groups of servers that share a common power source and network switch. Update domains are groups of servers that are updated together during maintenance events. By deploying your VMs across multiple fault domains and update domains, you can ensure that your service remains available even during maintenance events.

Availability zones are a feature that provides an even higher level of fault tolerance than availability sets. Availability zones are physically separate datacenters within an Azure region. Each availability zone is composed of one or more datacenters that are located within a few miles of each other. By deploying your VMs across multiple availability zones, you can ensure that your service remains available even if an entire datacenter goes offline. When you create VMs in an availability zone, Azure automatically deploys them across multiple fault domains and update domains within that zone.

Proximity placement groups and host groups are not directly related to high availability. Proximity placement groups allow you to group VMs together in a way that maximizes network latency, while host groups allow you to group VMs together on specific physical hosts. While these features can be useful for optimizing performance and resource allocation, they do not provide any additional fault tolerance.

Therefore, the correct answer to ensure the service will be available if a datacenter fails is D. availability zones.