🧱 Network Security Layers
In enterprise environments, network security is not a single product—it’s a layered approach known as Defense in Depth. This model ensures that even if one control fails, others can still protect the system.
🔐 Key Network Security Layers:
- Physical Layer: Restricting physical access to devices (locked racks, access cards, CCTV)
- Network Layer: Firewalls, VLAN segmentation, IP filtering, traffic control
- Perimeter Layer: Border firewalls, IDS/IPS systems
- Endpoint Layer: Protecting clients/servers with antivirus, EDR, patching
- Application Layer: Web app firewalls, OWASP mitigation (e.g. XSS, SQLi)
- Data Layer: Data encryption, access control, DLP (Data Loss Prevention)
- User Layer: Security awareness, MFA, proper role-based access
Layered security minimizes risk by ensuring there’s no single point of failure. It’s the foundation of resilient modern cybersecurity.
