Network Defense Essentials (NDE) Practice Exam 2025 - Free Network Defense Practice Questions and Study Guide

The identification of traffic signatures that indicate unauthorized access attempts is crucial in network defense and security monitoring. Unauthorized access signatures are patterns or behaviors noted in network traffic that reflect attempts to gain entry into systems or resources without proper authorization.

Such signatures are typically defined and recognized through various security tools and monitoring systems. They may involve unusual access patterns, attempts to access restricted areas, or repeated failed login attempts from a single source. Recognizing these patterns allows network defenders to respond promptly to potential intrusions.

In contrast, the other options refer to access types that do not imply any suspicious activity. Normal access refers to legitimate activities performed by authorized users, while legitimate access specifically denotes authorized usage compliant with security policies. Figment access is not a standard term in cybersecurity and does not represent a recognized traffic pattern. Overall, identifying unauthorized access signatures is a critical aspect of detecting and preventing security breaches, making this answer the most appropriate choice.