Network security encompasses the technologies, processes, and policies designed to protect the integrity, confidentiality, and availability of computer networks and their data. It defends against unauthorized access, misuse, modification, and denial of network resources through layered technical and administrative controls.
Network security is a fundamental component of an organization's overall cybersecurity posture, protecting the infrastructure that connects systems, users, and data across an organization.
Core Components of Network Security
Firewalls: Network firewalls inspect and filter incoming and outgoing traffic based on predefined security rules, blocking unauthorized connections while permitting legitimate traffic. Next-generation firewalls (NGFWs) add application awareness, intrusion prevention, and advanced threat detection.
Intrusion Detection and Prevention Systems (IDS/IPS): Monitor network traffic for known attack signatures and anomalous behavior, alerting security teams (IDS) or automatically blocking malicious traffic (IPS).
Virtual Private Networks (VPNs): Encrypt network communications between remote users and corporate networks, protecting data in transit from interception.