What can effective network security measures prevent in a home automation system?

Effective network security measures are crucial in a home automation system as they primarily aim to protect against unauthorized access and breaches. When security protocols are in place, they ensure that only authorized users can interact with the system, significantly reducing the risk of malicious attacks or intrusion. This protection is especially important in a home automation setup where sensitive personal data and control over various devices are handled. Unauthorized access could allow intruders to manipulate home systems, which could lead to privacy violations or even physical security threats within the home.

In contrast, reduced control over devices, improved performance without security, and increased complexity of device management do not accurately reflect the primary aim of security measures. Instead, security enhances control by safeguarding the system from external threats and maintaining the integrity of device management. Therefore, the correct answer underscores the essential role of effective security in protecting home automation systems from unauthorized access.