The Fortinet Network Security Expert 4 (NSE 4) certification is a significant step in Fortinet’s certification track, signifying a more advanced level of expertise in Fortinet’s network security technologies.

NSE 4 typically covers a wide array of topics related to Fortinet’s products and solutions, including:

1. FortiGate Security and Configuration: In-depth understanding of FortiGate features, configuration, and troubleshooting, including firewall policies, security fabric, VPNs, and high availability.
2. FortiGate Infrastructure: Knowledge of networking and security concepts applied to FortiGate devices, including routing, switching, NAT, IPsec, SSL, and more.
3. Advanced Threat Protection: Familiarity with advanced threat protection mechanisms like sandboxing, intrusion prevention, antivirus, and application control.
4. Fortinet Security Fabric: Understanding how various Fortinet products integrate into the Security Fabric to provide comprehensive security across the network.

The NSE 4 certification is ideal for professionals who want to demonstrate their expertise in designing, implementing, managing, and troubleshooting Fortinet security solutions.