- A
Virtual network peering
VNet peering enables private communication between the VNets over the Azure backbone.
- B
A site-to-site VPN
Why wrong: A site-to-site VPN is used to connect on-premises networks to Azure or separate networks over VPN infrastructure.
- C
A network security group
Why wrong: An NSG filters traffic but does not create connectivity between VNets.
- D
An Azure Firewall policy only
Why wrong: Firewall policy manages filtering rules but does not create the base network connection.
Question 466 of 1,170
AZ-104 Implement and Manage Virtual Networking Practice Question
This AZ-104 practice question tests your understanding of implement and manage virtual networking. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You have two virtual networks in the same Azure region named VNet-App and VNet-DB. Resources in the two networks must communicate privately over the Azure backbone without using VPN gateways. What should you configure?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Virtual network peering
Virtual network peering connects two Azure virtual networks in the same region via the Microsoft backbone infrastructure, enabling private IP communication without a VPN gateway or public internet. This is the correct solution because it meets the requirement for private, low-latency connectivity between VNet-App and VNet-DB using Azure's high-speed backbone.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Virtual network peering
Why this is correct
VNet peering enables private communication between the VNets over the Azure backbone.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A site-to-site VPN
Why it's wrong here
A site-to-site VPN is used to connect on-premises networks to Azure or separate networks over VPN infrastructure.
When this WOULD be correct
You need to connect an on-premises network to an Azure virtual network securely over the internet. A site-to-site VPN would be the correct choice for hybrid connectivity.
- ✗
A network security group
Why it's wrong here
An NSG filters traffic but does not create connectivity between VNets.
When this WOULD be correct
You need to control inbound and outbound traffic to/from a subnet or network interface in a virtual network, such as allowing only specific ports or IP addresses.
- ✗
An Azure Firewall policy only
Why it's wrong here
Firewall policy manages filtering rules but does not create the base network connection.
When this WOULD be correct
A question that asks: 'You need to centrally inspect and filter traffic between two peered virtual networks in the same region. What should you configure?' In that case, an Azure Firewall policy (with Azure Firewall deployed) would be correct to enforce security rules.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-104 exam frequently reuses these exact scenarios with slightly different constraints.
✓Virtual network peeringCorrect answer▾
Why this is correct
VNet peering enables private communication between the VNets over the Azure backbone.
✗A site-to-site VPNWrong answer — click to see why▾
Why this is wrong here
A site-to-site VPN requires a VPN gateway and connects on-premises networks to Azure, not two Azure virtual networks in the same region. It does not provide private communication over the Azure backbone without a gateway.
★ When this WOULD be the correct answer
You need to connect an on-premises network to an Azure virtual network securely over the internet. A site-to-site VPN would be the correct choice for hybrid connectivity.
Why candidates choose this
Candidates may confuse site-to-site VPN with VNet-to-VNet VPN, which can connect VNets but still requires VPN gateways, not the private backbone peering.
✗A network security groupWrong answer — click to see why▾
Why this is wrong here
Network security groups (NSGs) filter traffic but do not establish connectivity between virtual networks; they are not a connectivity solution.
★ When this WOULD be the correct answer
You need to control inbound and outbound traffic to/from a subnet or network interface in a virtual network, such as allowing only specific ports or IP addresses.
Why candidates choose this
Candidates may confuse traffic filtering with connectivity, thinking that allowing traffic via NSG rules is sufficient for cross-VNet communication.
✗An Azure Firewall policy onlyWrong answer — click to see why▾
Why this is wrong here
An Azure Firewall policy alone does not enable private connectivity between virtual networks; it only controls traffic filtering. To allow private communication over the Azure backbone, you need virtual network peering or a VPN gateway, not just a firewall policy.
★ When this WOULD be the correct answer
A question that asks: 'You need to centrally inspect and filter traffic between two peered virtual networks in the same region. What should you configure?' In that case, an Azure Firewall policy (with Azure Firewall deployed) would be correct to enforce security rules.
Why candidates choose this
Candidates may think that a firewall policy can establish connectivity because it controls traffic flow, but it only filters traffic; it does not create network links between VNets.
Analysis generated from the official AZ-104blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse network security groups (NSGs) or Azure Firewall as connectivity solutions, when they are only security controls that require an existing network path (like peering) to function.
Detailed technical explanation
How to think about this question
Virtual network peering uses the Azure backbone to route traffic between VNets with no intermediate hops, achieving latency equivalent to a single VNet. When you peer two VNets in the same region, traffic flows through the Microsoft network fabric without any bandwidth charges (only egress charges apply for cross-region peering). A common real-world scenario is a hub-and-spoke topology where a central VNet (e.g., management) peers with multiple spoke VNets (e.g., app and DB) to enable private communication while maintaining network isolation.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this AZ-104 question test?
Implement and Manage Virtual Networking — This question tests Implement and Manage Virtual Networking — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Virtual network peering — Virtual network peering connects two Azure virtual networks in the same region via the Microsoft backbone infrastructure, enabling private IP communication without a VPN gateway or public internet. This is the correct solution because it meets the requirement for private, low-latency connectivity between VNet-App and VNet-DB using Azure's high-speed backbone.
What should I do if I get this AZ-104 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jun 11, 2026
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