Which option is crucial for securing data from unauthorized access in a network?

Securing data from unauthorized access relies heavily on a secure network design. A well-structured network architecture ensures that only authorized users and devices can access sensitive information, employing various techniques such as segmentation, firewalls, and access control lists. By implementing a secure network design, organizations can minimize vulnerabilities that may be exploited by attackers to gain unauthorized access to their data.

For instance, segmenting the network helps isolate critical systems from less secure areas, thus containing potential breaches. Furthermore, incorporating strong authentication mechanisms and securely configured access points enhances control over who can access the network resources, making it significantly harder for unauthorized individuals to infiltrate the network.

Although the other options like URL filtering, malware scanning, and network backups contribute to overall data security, they serve more as protective measures or recovery strategies rather than foundational practices for securing access to data itself in the network. URL filtering focuses on blocking access to harmful or inappropriate websites, while malware scanning detects and removes threats that may have already infiltrated the system. Network backups are essential for data recovery in the event of loss or corruption but do not prevent unauthorized access. Thus, a secure network design is fundamental for laying the right groundwork to protect data from unauthorized access.