* Arelational databaseis structured to recognize relations among stored items of information.
* Multiple tablesin a relational database can have interrelated fields.
* These relationships are often managed throughforeign keys, which reference the primary keys of other tables.
* This relational model allows for complex queries and data integrity across the database.
* Example:Tables such asCustomers,Orders, andProductsin a sales database, whereOrderstable may reference bothCustomersandProductstables to establish relationships.
References:
"Database System Concepts" by Silberschatz, Korth, and Sudarshan.
"SQL and Relational Theory" by C.J. Date.

Scripting languages are designed for integrating and communicating with other programming languages.
* Python: A high-level scripting language known for its readability and extensive library support.
* PHP: A server-side scripting language used primarily for web development.
References
* "Python Crash Course" by Eric Matthes
* "PHP and MySQL Web Development" by Luke Welling and Laura Thomson

The correct answer is C - Data loss prevention (DLP).
According to WGU Cybersecurity Architecture and Engineering (KFO1 / D488), DLP technologies monitor and control the transfer of sensitive information outside of the corporate network, preventing unauthorized data exfiltration whether by internal misuse or external threats.
MFA (A) strengthens authentication but does not monitor data transfer. IDS (B) detects intrusions but does not prevent data loss. IPS (D) blocks network attacks but is not specifically designed for preventing exfiltration of sensitive data.
Reference Extract from Study Guide:
"Data loss prevention (DLP) solutions protect sensitive data by monitoring, detecting, and blocking potential data exfiltration attempts."
- WGU Cybersecurity Architecture and Engineering (KFO1 / D488), Data Protection Technologies

The correct answer is B - Regularly backing up the data stored in the POS system and having a disaster recovery plan can help ensure that the system is available in the event of a security incident or system failure.
As explained in WGU Cybersecurity Architecture and Engineering (KFO1 / D488), backing up critical systems and establishing a disaster recovery plan ensures business continuity and system availability even after incidents like hardware failures, cyberattacks, or data corruption.
While intrusion detection (A), access control (C), and patch management (D) contribute to overall security, backups and disaster recovery specifically ensure availability.
Reference Extract from Study Guide:
"Data backups and disaster recovery planning are essential controls to ensure system availability during and after a security incident or technical failure."
- WGU Cybersecurity Architecture and Engineering (KFO1 / D488), Business Continuity and Disaster Recovery

The correct answer is D - Implementation of licensing technologies in order to restrict unauthorized access to the system.
According to WGU Cybersecurity Architecture and Engineering (KFO1 / D488), using licensing technologies helps prevent software piracy by ensuring that only authorized users with valid licenses can access and operate the system. License management solutions validate user access and reduce unauthorized duplication or usage of proprietary software.
Disabling external devices (A) protects against physical data theft but not piracy. Encrypting patient data (B) protects confidentiality but not against software piracy. Virus scanning (C) detects malware, not unauthorized software copying.
Reference Extract from Study Guide:
"Licensing technologies enforce legal software use and prevent unauthorized access, helping organizations protect intellectual property and defeat piracy efforts."
- WGU Cybersecurity Architecture and Engineering (KFO1 / D488), Software and Intellectual Property Protection