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Every topic page has the same structure: TL;DR, mental model, topology diagram, commands, verification, common mistakes, lab to try, printable cheat strip. Free. No email wall.
CCNA® 200-301
Cisco's foundational networking certification. Everything a junior network engineer needs in their first US role — full exam blueprint coverage across all 6 domains.
- ✓Network Fundamentals · Access · IP Connectivity
- ✓IP Services · Security · Automation
- ✓Aligned with Cisco 200-301 blueprint
CompTIA Network+ (N10-009)
Vendor-neutral networking foundation. Perfect first cert, or the compliance box for US federal / DoD IT roles under 8570 IAT Level II.
- ✓Concepts · Implementation · Operations
- ✓Security · Troubleshooting
- ✓Aligned with CompTIA N10-009 blueprint
Fortinet NSE 4 / FCP FortiGate
FortiGate firewall administration (FortiOS 7.4). The vendor-neutral routing, VPN, NAT, and AAA prerequisites NSE 4 assumes you know.
- ✓Routing (static, OSPF, BGP) · SD-WAN foundations
- ✓IPsec / SSL VPN · NAT · Authentication
- ✓Threat & crypto fundamentals
CCNP-level topics
Topics beyond the CCNA blueprint — deeper routing, advanced security, modern automation. Not full CCNP curriculum coverage. The topics that pair naturally with CCNA learning.
- ✓BGP · OSPF Multi-Area · EIGRP · IPv6 routing
- ✓GRE Tunnels · AnyConnect VPN
- ✓gRPC/gNMI telemetry · TCP state lifecycle
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