Which technique can enhance wireless network security at multiple layers?

Layered encryption enhances wireless network security by implementing multiple encryption protocols across different layers of the network model. This approach provides comprehensive protection, making it more difficult for unauthorized users to access sensitive data as they would need to bypass several security measures.

In this context, layered encryption can involve applying encryption at both the physical layer (using protocols such as WPA2 or WPA3 for protecting data being transmitted over the air) and at the application layer (using protocols such as HTTPS or SSL/TLS), thus securing data in transit and at rest. By having multiple layers of encryption, even if one encryption method were to be compromised, additional layers continue to safeguard the data.

In contrast, single-layer encryption provides a single point of security and may be inadequate against sophisticated attacks. Open network policies expose wireless networks to unauthorized access, while unmonitored access points can lead to increased vulnerability as they may not be adequately secured or regulated, allowing threats to infiltrate the network. Therefore, layered encryption stands out as the robust choice for strengthening security across multiple layers in a wireless network.