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

Tokenization is the process that provides protection for data at rest by replacing sensitive data elements with non-sensitive equivalents, known as tokens. These tokens have no intrinsic value and can only be mapped back to the original data through a secure tokenization system. This ensures that even if an unauthorized entity gains access to the stored data, they will find only tokens instead of actual sensitive information, thus significantly reducing the risk associated with data breaches.

Other options do not focus on safeguarding data at rest. Data compression is primarily concerned with reducing the size of data for storage or transmission, not necessarily its security. Session management involves maintaining a user's session securely during their interaction with a system but does not protect data stored in a database or on disk. Multi-factor authentication enhances security by requiring multiple forms of verification for user access, but it pertains to the authentication process rather than directly securing data at rest.