Azure Administrator Associate AZ-104 Book

In Azure, Load Balancers distribute network traffic across multiple virtual machines (VMs) to ensure high availability and reliability. To add virtual machines to the backend pool of an Azure Load Balancer, the following key conditions must be met according to the Microsoft Azure Administrator documentation:

All VMs in the backend pool must be connected to the same virtual network (VNet) as the Load Balancer.

The Load Balancer (in this case, LB1) is configured for internal load balancing on VNET1/Subnet1 as per the technical requirements of the case study.

The backend pool can include network interfaces (NICs) from VMs within the same region and VNet.

Step-by-step analysis:

From the case study data:

VM

Location

Connected to

IP Address

VM1

West US

VNET1/Subnet1

10.0.1.4

VM2

West US

VNET1/Subnet2

10.0.2.4

LB1

Internal Basic Load Balancer

Connected to VNET1/Subnet1

—

Observation:

VM1 is already connected to VNET1/Subnet1, where the internal Load Balancer LB1 is also deployed.

VM2, however, is connected to VNET1/Subnet2, which is a different subnet within the same virtual network.

According to Microsoft Learn (“Configure backend pools in Azure Load Balancer”):

“All network interfaces in the backend pool must be within the same virtual network as the load balancer. You cannot add VMs connected to different VNets or subnets not associated with the load balancer’s front-end configuration.”

Therefore, before you can add VM2 to the backend pool, you must ensure that its network interface is attached to VNET1/Subnet1, the same subnet used by LB1.

Only after this step will both VMs (VM1 and VM2) be eligible for inclusion in LB1’s backend pool.

Incorrect Option Analysis:

A. Create a new NSG and associate the NSG to VNET1/Subnet1.

❌ Not required. Network Security Groups control traffic filtering, not backend pool configuration.

C. Redeploy VM1 and VM2 to the same availability zone.

❌ Availability Zones only matter for redundancy and failover, not for backend pool eligibility in a basic internal load balancer.

D. Redeploy VM1 and VM2 to the same availability set.

❌ Basic Load Balancers can distribute traffic across VMs in the same availability set, but both VMs must already reside in the same VNet/Subnet first.

Final Verified Answer:

✅ B. Connect VM2 to VNET1/Subnet1

Reference (Microsoft Official Documentation):

Microsoft Learn: Configure the backend pool for Azure Load Balancer

Microsoft Learn: Azure Load Balancer overview

Microsoft Learn: Create and configure an internal load balancer

Microsoft Learn: Virtual network and subnet requirements for load balancing

Azure role-based access control (Azure RBAC) for Azure file shares requires identity-based authentication integration. According to the Microsoft Azure Administrator documentation, this feature is only supported for StorageV2 (general purpose v2) and FileStorage account types.

In this scenario:

You are required to grant Group4 read-only access using Azure RBAC on Azure file shares.

The technical requirement specifies:

“Whenever possible, grant Group4 Azure RBAC read-only permissions to the Azure file shares.”

From the case study data:

Storage Account

Kind

Identity-based Access

storage1

Storage (general purpose v1)

Azure AD DS

storage2

StorageV2

Disabled

storage3

BlobStorage

N/A

storage4

FileStorage

Azure AD DS

The Storage (general purpose v1) type (storage1) does not support Azure AD or Azure RBAC integration for file shares. Microsoft documentation clearly states that “StorageV1 accounts must be upgraded to StorageV2 to support Azure AD authentication and RBAC role assignments.”

Meanwhile, FileStorage (storage4) already supports Azure AD Domain Services (Azure AD DS) and RBAC role assignment; hence no further modification is required there. However, to make storage1 compatible, it must be converted from StorageV1 to StorageV2.

Once converted to StorageV2, you can then:

Enable identity-based access for Azure file shares.

Assign Azure RBAC roles (e.g., Storage File Data Reader) to Group4.

Microsoft-Documented Requirements Summary:

Supported Account Types: StorageV2 or FileStorage

Unsupported: StorageV1 and BlobStorage

Required RBAC Roles for Read-Only Access:

Storage File Data Reader (or custom read-only role)

Thus, to meet the organization’s requirement to provide Azure RBAC read-only permissions, you must change the account type of storage1 to StorageV2, ensuring both storage1 and storage4 can be managed with Azure RBAC.

1️⃣ Create a Log Analytics workspace.

2️⃣ Collect Windows performance counters from the Log Analytics agents.

3️⃣ Create an alert rule.

The question states:

“You need to configure the alerts for VM1 and VM2 to meet the technical requirements.”

The technical requirement from the case study specifies:

“Trigger an alert if VM1 or VM2 has less than 20 GB of free space on volume C.”

This requirement involves monitoring performance metrics (disk space) and generating alerts based on those metrics. According to Microsoft Azure monitoring and management documentation, the process to configure such alerts involves using Azure Monitor and Log Analytics.

Step-by-Step Verified Solution:

Step 1: Create a Log Analytics workspace

A Log Analytics workspace is required to store and analyze logs and performance data collected from virtual machines.

Azure Monitor uses this workspace as the central repository for performance counters, events, and logs from connected agents.

From the Microsoft Documentation:

“Before you can collect and query data from virtual machines, you must create a Log Analytics workspace in your subscription.”

(Source: Azure Monitor and Log Analytics Guide)

Step 2: Collect Windows performance counters from the Log Analytics agents

After creating the workspace, you must connect VM1 and VM2 to the workspace and configure the Windows performance counters that you want to monitor.

In this case, you would collect the LogicalDisk(%) Free Space counter for C: drive.

Azure Monitor agent or Log Analytics agent collects these metrics and sends them to the workspace for analysis.

“To monitor system performance, configure the agent to collect performance counters such as available memory or free disk space.”

(Source: Azure Monitor Performance Counters Documentation)

Step 3: Create an alert rule

Once performance data is being collected, you can create an alert rule in Azure Monitor based on a Kusto query or metric threshold.

You would define a condition such as:

LogicalDisk | where FreeSpaceMB < 20480

and configure it to trigger an alert when free space on volume C drops below 20 GB.

This alert can notify via email, action group, or automation runbook.

“Alerts in Azure Monitor proactively notify you when important conditions are found in your monitoring data. Alerts can trigger automated actions or notifications.”

(Source: Azure Monitor Alerts Overview)

Incorrect Options (Eliminated):

Configure the Diagnostic settings:

Used for collecting activity logs or resource logs, not performance counters from VMs.

Create an Azure SQL database:

Not relevant to the scenario of monitoring disk space.