Fortinet NSE 4: FortiGate Infrastructure

The FortiGate Infrastructure half of the NSE 4 program. Eight official modules covering routing, SD-WAN, virtual domains, Layer 2 switching, IPsec VPN, FSSO, high availability, and diagnostics for real ISP and enterprise networks. Each module combines exam-grade concept coverage, real FortiOS CLI examples, best-practice callouts, and inline knowledge checks.