CISSP Practice Exam 2025 – Complete Prep Guide

Direct Sequence Spread Spectrum (DSSS) is a modulation technique used in wireless communications that spreads the signal over a wider bandwidth than the minimum bandwidth necessary to transmit the information. This technique enhances resistance to interference and improves signal security against eavesdropping.

In DSSS, the data signal is multiplied by a pseudo-random noise sequence, which increases the signal's bandwidth. This spreading allows for multiple users to share the same frequency spectrum while minimizing interference through a process called spreading and despreading. The performance advantages of DSSS make it suitable for various applications, such as GPS and some wireless local area networks.

The other options don't accurately define DSSS. "Direct Sequence Spared Spectrum," "Dynamic Spread Spectrum," and "Direct Signal Spared Spectrum" either contain inaccuracies or do not represent the established terminology used in wireless communication. Understanding the principles and terminology of DSSS is crucial for professionals in the information security field, as it plays a vital role in protecting data communications.