Microsoft Certified: Azure Fundamentals (AZ-900) Practice Exam

Which statement is true regarding virtual networks in Azure?

1. They require physical configuration

2. All ports are open by default

3. They are configurable through software

4. They are automatically secure from external access

The correct answer is: They are configurable through software

The statement that virtual networks in Azure are configurable through software is accurate. Azure allows users to define and manage their virtual networks entirely through the Azure portal, command-line interface, or an API, making it easy to customize the network's architecture and security settings according to specific needs. This capability exemplifies the flexibility and scalability that cloud services offer, allowing users to dynamically adjust their resources without the need for physical hardware modifications. In contrast to this correct statement, the notion of requiring physical configuration does not apply to Azure services, as the cloud environment abstracts physical components. The idea that all ports are open by default is misleading; Azure provides a default security posture that limits access until explicitly configured otherwise. Additionally, while Azure makes it easier to secure networks, they are not automatically impervious to external access; adequate security measures must be implemented to protect against potential threats.