The Microsoft Azure Administrator AZ-104 certification validates your ability to manage and configure Azure infrastructure at an enterprise level. Virtual networking is one of the heaviest domains on the exam, representing roughly 15 to 25 percent of total exam questions.
Candidates must understand Azure Virtual Networks, Network Security Groups, VNet Peering and connectivity troubleshooting. AZ-104 questions are almost entirely scenario-based, meaning you need to think like an administrator solving a real cloud network problem – not someone reciting definitions from a study guide.
What Azure Virtual Networking Means in the AZ-104 Exam
Azure Virtual Networking lets administrators build isolated cloud environments for Azure resources, functioning much like a traditional on-premises network. The exam tests your ability to design, secure, connect and troubleshoot these environments under realistic conditions.
Questions rarely ask what a VNet is. They ask what you would do when two VNets cannot communicate, or why an NSG rule is blocking legitimate traffic. Understanding the logic behind each networking decision is far more useful than memorizing portal steps.
Scenario 1: Designing a Virtual Network (VNet)
A company needs to deploy multiple Azure virtual machines with secure internal communication between web, application and database tiers. The administrator creates a VNet with a /16 address space and divides it into dedicated subnets – one for web workloads, one for application services and one for backend databases.
Proper CIDR planning is critical here. Overlapping address ranges between subnets or peered VNets will cause routing failures that are difficult to diagnose later. Exam answers that separate workloads using subnets and avoid overlapping IP ranges are almost always the correct choice in architecture-based questions.
Scenario 2: Securing Resources with Network Security Groups (NSGs)
An organization wants to allow HTTP traffic to its web servers while blocking all other inbound connections. The solution is a Network Security Group with a targeted inbound rule allowing traffic on port 80 from the internet, while a lower-priority deny rule blocks everything else.
NSG rules are processed by priority number and the lowest number is evaluated first. Many candidates preparing with updated Microsoft AZ-104 Exam Dumps identify rule priority order as one of the most frequently tested NSG concepts – a small misunderstanding here can cost points on multiple questions. Always think through the rule evaluation order before selecting an answer.
Scenario 3: Connecting Networks with VNet Peering
A company runs two separate Azure VNets – one for production workloads and one for development. Both environments need to communicate privately without exposing traffic to the public internet.
VNet peering connects the two networks using Azure’s private backbone, eliminating the need for VPN gateways and reducing latency. The address spaces of both VNets must not overlap and peering must be configured on both sides to establish the connection. The exam frequently compares VNet peering against VPN Gateway solutions – peering is the preferred answer when both VNets are within Azure and low-latency private communication is the goal.
Scenario 4: Troubleshooting Network Connectivity
A virtual machine in one subnet cannot reach a database server in another subnet. This scenario tests whether you can systematically work through the most common causes: an NSG rule blocking the traffic, an incorrect route table entry, a DNS misconfiguration, or a subnet that was configured incorrectly during deployment.
Azure Network Watcher is the go-to tool for diagnosing these issues. The IP Flow Verify feature checks whether a specific traffic flow is allowed or denied by NSG rules, while Connection Troubleshoot tests end-to-end connectivity between resources. Exam questions in this area expect you to know which tool to use first and what each result means.
Common Azure Networking Mistakes (Exam Traps)
Overlapping VNet address spaces are the single most common configuration error the exam uses to trap candidates. Once two VNets have overlapping ranges, peering is impossible and the only fix is to rebuild – a painful lesson in real environments and a clear wrong answer on the exam.
Missing NSG rules, incorrect subnet sizing and forgetting to configure peering on both VNets are other traps that appear regularly. Recognizing these patterns during practice makes it much easier to eliminate wrong answer choices quickly when time pressure builds during the real exam.
Quick Exam Checklist
Before any Azure networking deployment is considered complete, an administrator should confirm the following steps. Plan the VNet address space using non-overlapping CIDR blocks. Create dedicated subnets for each workload tier. Configure NSG rules with correct priority order to allow and deny the right traffic. Set up VNet peering on both sides when cross-VNet communication is required. Validate connectivity using Azure Network Watcher and IP Flow Verify.
For scenario-driven Microsoft exam preparation that reflects real exam questions, Microsoft Certification Exams Practice Tests on Certshero provide regularly updated materials mapped directly to the exam domains.
Conclusion
Azure Virtual Networking is one of the most practical and heavily tested areas of the AZ-104 exam. Mastering VNets, NSGs and VNet peering gives you the foundation to answer both architecture and troubleshooting questions with confidence.
Focus on understanding why each networking decision matters in a real cloud environment. That deeper reasoning is what the exam actually rewards – and it is what makes you effective as an Azure administrator long after the certification is earned.
VNet Peering connects two Azure VNets directly through Azure’s private backbone network, offering low latency and no bandwidth cost per connection. A VPN Gateway creates an encrypted tunnel and is typically used when connecting Azure to on-premises networks or non-Azure environments. For AZ-104, peering is the preferred answer whenever both networks are within Azure.
NSG rules are evaluated in ascending priority order, meaning the rule with the lowest number is processed first. If a rule with priority 100 allows traffic on port 80, that decision is made before any higher-numbered rules are checked. The exam tests this frequently – understanding that lower numbers mean higher priority is essential for answering NSG questions correctly.