Network Defense Essentials (NDE) Practice Exam 2026 – Your All-in-One Resource to Exam Success!

The communication layer plays a crucial role in securing data sent and received between IoT devices. By enforcing lightweight message-based protocols in this layer, double encryption and filtering can be effectively implemented to safeguard sensitive information during transmission. These protocols are designed to be efficient and suitable for the constraints of IoT devices, which often have limited processing power and memory.

Lightweight protocols enable secure communication even in environments where bandwidth and power consumption are critical considerations. Thus, by focusing security measures at the communication layer, the integrity and confidentiality of the data being exchanged can be enhanced, making it more robust against potential threats and vulnerabilities.

In contrast, the process layer concerns itself with the operations of devices and their interactions, while the device layer is focused on the security of the devices themselves. The cloud layer manages storage and experience a different set of security challenges related to data handling and storage, not directly related to the immediate transmission of data. Therefore, the communication layer is the most appropriate choice for implementing lightweight message-based protocols for enhanced security.