What approach does network security encompass to protect networks?

Network security encompasses a comprehensive approach that includes various policies and practices designed to protect the integrity, confidentiality, and availability of networks. This includes establishing security protocols, enforcing rules and guidelines for users, conducting regular assessments, and implementing technological solutions like firewalls, intrusion detection systems, and encryption.

Focusing solely on policies and practices allows for a holistic view of security that addresses not only technical measures but also human factors and organizational culture, which are essential in mitigating risks and responding to threats effectively.

In contrast, physical security measures alone do not address vulnerabilities in the data and traffic transmitted over the network. Similarly, relying exclusively on software solutions overlooks the importance of user behavior and operational strategies, while public awareness programs, while valuable for educating users, would not be sufficient on their own without policies and practices to guide overall security efforts. Hence, an effective network security strategy integrates all these elements, but the most encompassing approach is through policies and practices.