The answer is Azure VPN Gateway. This service is the correct choice because it supports point-to-site (P2S) VPN connections using the Secure Socket Tunneling Protocol (SSTP), which creates an SSL-based VPN tunnel over TCP port 443, enabling remote users to securely access both Azure and on-premises resources through the gateway. On the AZ-900 exam, this question tests your understanding of hybrid networking and remote access solutions, often appearing as a scenario where you must identify the service that provides SSL-based connectivity for individual users rather than entire branch offices. A common trap is confusing Azure VPN Gateway with Azure ExpressRoute, but remember that ExpressRoute is a dedicated private connection, not an SSL VPN. For a quick memory tip, think of the “S” in SSL and SSTP as standing for “Secure Single-user” — Azure VPN Gateway’s point-to-site mode is the only service that offers SSL-based remote access for individual users.
AZ-900 Describe Azure architecture and services Practice Question
This AZ-900 practice question tests your understanding of describe azure architecture and services. 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.
Which Azure service enables you to securely connect remote users to Azure and on-premises resources using an SSL-based VPN?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure VPN Gateway
Azure VPNGateway supports site-to-site, point-to-site, and VNet-to-VNet connections. Point-to-site (P2S) VPN uses SSTP (Secure Socket Tunneling Protocol) or IKEv2 VPN, and when configured with SSTP, it provides an SSL-based VPN tunnel (TCP port 443) that allows remote users to securely connect to Azure and on-premises resources through the gateway.
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 it's wrong here
ExpressRoute provides a private dedicated connection, not an internet-based SSLVPN for remote users.
✗
Azure Bastion
Why it's wrong here
Bastion provides browser-based RDP/SSH to VMs without exposing ports; VPNGateway enables full network connectivity.
✓
Azure VPN Gateway
Why this is correct
VPNGateway provides encrypted IPsec/SSL VPN connections for site-to-site and point-to-site connectivity.
Related concept
Read the scenario before looking for a memorised answer.
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure VPNGateway (which does support SSL-based P2S VPN) with Azure Application Gateway (a Layer 7 load balancer) or Azure Bastion (a secure RDP/SSH jump server), mistakenly thinking those services provide VPN connectivity.
Detailed technical explanation
How to think about this question
Azure VPNGateway's point-to-site (P2S) VPN can use the SSTP protocol, which is a Microsoft proprietary SSL-based VPN protocol that encapsulates PPP frames over HTTPS (TCP 443). This allows remote clients to authenticate using Azure AD, certificate-based authentication, or RADIUS, and after establishing the tunnel, they can access resources in the connected virtual network and any on-premises networks reachable via site-to-site VPN or ExpressRoute. A common real-world scenario is a remote workforce needing secure access to Azure-hosted applications without a dedicated on-premises VPN device.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-900 question in full detail.
Describe Azure architecture and services — This question tests Describe Azure architecture and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure VPN Gateway — Azure VPN Gateway supports site-to-site, point-to-site, and VNet-to-VNet connections. Point-to-site (P2S) VPN uses SSTP (Secure Socket Tunneling Protocol) or IKEv2 VPN, and when configured with SSTP, it provides an SSL-based VPN tunnel (TCP port 443) that allows remote users to securely connect to Azure and on-premises resources through the gateway.
What should I do if I get this AZ-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.
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Question Discussion
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