- A
Azure ExpressRoute
ExpressRoute creates a private, dedicated connection from the customer's network to Microsoft's cloud, ensuring traffic does not go over the public internet. It is ideal for hybrid deployments requiring low latency and reliability.
- B
Azure VPN Gateway
Why wrong: Azure VPN Gateway connects on-premises networks to Azure over the public internet using encrypted tunnels. It does not provide a dedicated private connection; ExpressRoute is the correct choice.
- C
Azure Virtual WAN
Why wrong: Azure Virtual WAN is a networking service that unifies branch connectivity, but it is not a direct private connection itself. ExpressRoute can be used as part of Virtual WAN but the question asks for the specific service that provides the private link.
- D
Microsoft Entra ID Application Proxy
Why wrong: Application Proxy allows remote users to access on-premises web applications securely without a VPN, but it does not connect the on-premises data center to the cloud for hybrid workloads. ExpressRoute is required for a dedicated private connection.
MS-900 Describe cloud concepts Practice Question
This MS-900 practice question tests your understanding of describe cloud concepts. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
A company needs a dedicated, private network connection between its on-premises data center and Microsoft's cloud infrastructure to support a hybrid deployment with low latency and high reliability. The connection must not traverse the public internet. Which service should they use?
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
Azure ExpressRoute
Azure ExpressRoute is the correct choice because it provides a dedicated, private network connection from an on-premises data center directly into Microsoft's cloud infrastructure, bypassing the public internet entirely. This ensures low latency, high reliability, and consistent performance for hybrid deployments, as the traffic traverses a private MPLS or Ethernet link rather than the unpredictable internet.
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.
- ✓
Azure ExpressRoute
Why this is correct
ExpressRoute creates a private, dedicated connection from the customer's network to Microsoft's cloud, ensuring traffic does not go over the public internet. It is ideal for hybrid deployments requiring low latency and reliability.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Azure VPN Gateway
- ✗
Azure Virtual WAN
Why it's wrong here
Azure Virtual WAN is a networking service that unifies branch connectivity, but it is not a direct private connection itself. ExpressRoute can be used as part of Virtual WAN but the question asks for the specific service that provides the private link.
- ✗
Microsoft Entra ID Application Proxy
Why it's wrong here
Application Proxy allows remote users to access on-premises web applications securely without a VPN, but it does not connect the on-premises data center to the cloud for hybrid workloads. ExpressRoute is required for a dedicated private connection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure VPN Gateway with a private connection because it uses encryption, but the key differentiator is that VPN traffic still traverses the public internet, whereas ExpressRoute bypasses it entirely for a truly private, dedicated link.
Detailed technical explanation
How to think about this question
ExpressRoute operates at Layer 3 (BGP) over a private MPLS or Ethernet circuit, with Service Level Agreements (SLAs) of 99.95% availability for dedicated circuits. It supports dynamic routing via eBGP and can be configured with redundant connections for high availability. In a real-world hybrid deployment, ExpressRoute enables sub-10ms latencies for latency-sensitive workloads like SAP HANA or SQL Server Always On Availability Groups, which VPNs cannot consistently achieve due to internet congestion and jitter.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this MS-900 question test?
Describe cloud concepts — This question tests Describe cloud concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure ExpressRoute — Azure ExpressRoute is the correct choice because it provides a dedicated, private network connection from an on-premises data center directly into Microsoft's cloud infrastructure, bypassing the public internet entirely. This ensures low latency, high reliability, and consistent performance for hybrid deployments, as the traffic traverses a private MPLS or Ethernet link rather than the unpredictable internet.
What should I do if I get this MS-900 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
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Last reviewed: Jun 11, 2026
This MS-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the MS-900 exam.
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