Microsoft Certified: Azure IoT Developer Specialty (AZ-220) Practice Test 2025 - Free AZ-220 Practice Questions and Study Guide

X.509 certificates are commonly recommended for production environments in IoT Central due to their robust security features. These certificates provide a high level of assurance regarding the identity of the devices connecting to the cloud. By using X.509 certificates, organizations can implement strong mutual authentication, ensuring that both the device and the service are verified before establishing a connection. This mechanism helps to prevent unauthorized access and reduces the risks associated with device impersonation.

Furthermore, X.509 certificates support key management practices and can be easily revoked or rotated, enhancing security over time. In scenarios involving many devices, managing certificates through a certificate authority (CA) simplifies deployment and maintenance, making them a preferable choice for large-scale IoT solutions.

While other options like passwords, shared access signatures, and OAuth tokens also have their uses, they do not match the comprehensive security and management capabilities offered by X.509 certificates, particularly in large, production-grade environments where scalability and reliability are essential.