Diffused IR systems are often used in lieu of RF wireless transmissions because _____.

Diffused infrared (IR) systems are indeed often preferred over RF wireless transmissions due to their enhanced security features. Unlike RF signals, which can be intercepted and decoded by anyone with the proper equipment within range, IR systems primarily transmit signals through line-of-sight. This characteristic significantly reduces the likelihood of eavesdropping, as the signals cannot be easily detected if the receiver is not within the direct path of the IR beam.

In scenarios where data security is a critical concern, such as in sensitive communication or secure environments, the use of IR systems offers an advantage that RF systems may not provide. This inherent limitation of RF makes it susceptible to interception, making IR a more attractive choice for secure communications despite other factors like cost, power consumption, or range that might not favor IR.