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NetForge-AI

A browser-native network lab and networking course, beginner to advanced. Free account opens Module 1 + a 5-device lab; the Course & Lab Pass or All-Access Max opens the full course.

Product

  • Lab
  • 3D Live
  • Networking Course
  • Lessons
  • Guided Builds
  • Network Challenges
  • For Teachers
  • Community
  • Features

Course modules

  • 1 · Fundamentals
  • 2 · Addressing
  • 3 · Access (L2)
  • 4 · Connectivity
  • Final Weighted Exam

Resources

  • Command Reference
  • Free Networking Tools
·

Meet 3D Live: walk inside the network you built

Hi everyone, the NetForge-AI team here.

Meet 3D Live: the network you build in the lab, turned into a 3D world you can walk through.

Wire a topology on the 2D canvas, press 3D Live, and a little engineer stands among your switches, routers, PCs and servers, with every cable you connected. Send a ping and watch it travel. Then step inside a device. A router shows each stage of handling the packet, from the port it arrived on to the new Ethernet header it writes, with the real addresses, the device's own tables and the show command that proves each step.

There are guided fault-finding missions too, and anything you build in 3D is saved back to your lab: the 2D canvas and 3D Live are one network.

3D Live is free on every plan and opens without an account. Try it at netforge-ai.com/lab/world

The 2D lab: PC1 pings SRV1 through a switch and a router The same lab: show ip route on R1 3D Live: the engineer next to the switch, the cables running to the PC and the router 3D Live: the whole network, PC, switch and router joined by cables Inside the router: the packet inspector rewrites the Ethernet header, step by step A 3D Live mission: find why the replies never come back

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    Sharpen your skills

    Jump into a hands-on lab challenge

    • Two PCs through a switchThe most basic LAN: two hosts in the same subnet talking via an L2 switch. Perfect for learning ARP and MAC learning.
    • Two LANs joined by a routerInter-subnet routing 101: two switches behind a router. Set IPs, default gateways, and ping across subnets.
    • Three-router WAN with static routesA small WAN: three routers in a triangle with serial-style links. Practice writing static routes for full reachability.
    • Small Business — ISP edge + DHCP-served LANCloud (ISP) → Edge router → Switch → 3 PCs (DHCP clients) + File server. Edge router runs a DHCP pool; PCs auto-acquire IPs. PAT on the Edge takes the private LAN out to the internet through one public address.
    Open the lab →
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    • NetForge-AI is an independent educational platform and is not affiliated with, endorsed by, or sponsored by any networking vendor or certification body. All product names, protocols, and standards referenced are the property of their respective owners and are used for descriptive, educational purposes only.

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