Computer network security isnot a final solution or a task to be completed. Security is a continuous journey. Safeguards and infrastructures that worked before might offer little or no protection against future attacks. You must constantly develop and deploy new defenses against new exploits. This vigilance is the essence of network security management.
Network security management strives to maintain established security, adjust the infrastructure to future threats, and respond to breaches in a timely manner. Using a variety of techniques and tools, including incident response, host security, backup and recovery, checklists, and security assessment, network security management is a complex, but essential component of long-term, reliable security.