Network security refers to the measures and practices designed to protect computer networks from unauthorized access, misuse, or damage. It involves implementing various technologies, policies, and procedures to safeguard the integrity, confidentiality, and availability of data transmitted over networks. Common threats include malware, phishing, and denial-of-service attacks, which can compromise sensitive information and disrupt services. To enhance network security, organizations often use tools like firewalls, intrusion detection systems, and encryption. Regular updates and patches are essential to address vulnerabilities in software and hardware. Additionally, employee training on security best practices helps create a culture of awareness and vigilance against potential threats.