What is the main characteristic of a Data Diode?

A Data Diode is a cybersecurity device specifically designed to allow data to flow in only one direction. This characteristic is crucial for establishing a secure connection, particularly in environments that require stringent security measures, such as industrial control systems or classified networks. By ensuring that data can only exit a secure network and cannot re-enter, a Data Diode effectively mitigates the risk of data breaches and cyber attacks from external sources.

In scenarios where sensitive information is being transmitted, the one-way nature of a Data Diode helps protect critical systems from potential threats. This is especially important in situations where the integrity and confidentiality of the data are paramount.

The other options present characteristics that do not align with the fundamental operation of a Data Diode. For example, the encryption of traffic is important for securing data in transit but does not define the one-way functionality of a Data Diode. Likewise, the flow of current in both directions contradicts the very purpose of the device, as it is designed to prevent two-way communication. Lastly, while boosting signal strength can be a feature of various communication systems, it is not a primary function of a Data Diode.