Correct Answer: Disable the device in the IoT Hub device registry to block all future connections
Disabling a device in the IoT Hub registry is the fastest, most targeted isolation action. It immediately blocks that device from connecting or sending messages to IoT Hub without ...
Correct Answer
Disable the device in the IoT Hub device registry to block all future connections
Why This Answer Is Correct
Disabling a device in the IoT Hub registry is the fastest, most targeted isolation action. It immediately blocks that device from connecting or sending messages to IoT Hub without deleting its registration (preserving its twin and history for investigation). Regenerating the primary key would affect all devices using that key.
This question evaluates your knowledge of IoT Security — a core concept tested in Microsoft Certified: Azure IoT Developer Specialty (AZ-220). Understanding IoT Security is essential for designing scalable, secure, and cost-effective cloud architectures. Mastery of this topic will help you answer scenario-based questions confidently on exam day.
You need to authenticate IoT devices to IoT Hub in a way that each device has a unique cryptographic credential and a compromised device credential can be revoked without affecting other devices. Which authentication method should you use?
You are provisioning a large fleet of low-cost sensors using DPS symmetric key attestation. What is the security best practice for managing the symmetric keys in the device firmware?
You are deploying security agents on Linux IoT devices to monitor process creations, active network connections, and login attempts for security auditing. Which Microsoft Defender for IoT component should you install?
You are designing a high-security IoT device and must ensure its private keys are never exposed in system memory or storage. Which hardware component should you integrate, and how does the Azure IoT SDK support it?