Packet Path/

Study Tracks

Free, hands-on study tracks for network engineers. Every lesson opens with a lab-style challenge you attempt before reading the worked answer — the struggle is the point. Module 1 of each track is free, no account needed.

Enterprise Network Engineer

Module 1: Networking Fundamentals

The fundamentals→expert career path, starting from absolute zero.

  1. What Is a Network, Really?25 min
  2. How Computers Talk: Packets, Frames, and Addresses35 min
  3. IP Addresses and Subnets Without Tears40 min
  4. Your First Lab: Ping, Traceroute, and Reading Output35 min
  5. The OSI Model and TCP/IP: What Layers Actually Mean35 min
  6. TCP vs UDP and the Three-Way Handshake40 min
  7. DNS: The Internet's Phone Book40 min
  8. Ethernet and Cabling: The Physical Layer40 min
🔒 Module 2+ — Subscription — coming soon. The rest of this track will be paid; Module 1 above stays free forever.

Hyperscaler Network Engineer

Module 1: Data Centers from Zero

Data centers at scale, explained from the ground up.

  1. What Is a Data Center, Really?25 min
  2. Why Scale Changes Everything30 min
  3. Racks, Power, and Cooling — The Physical World30 min
  4. Servers, Switches, and Cables — The Hardware Zoo30 min
  5. What Is a Network, Really?35 min
  6. IP Addresses and Subnets for Absolute Beginners35 min
  7. Your First Lab — Make Two Servers Talk45 min
  8. Module Capstone — Draw and Defend Your First Mini Data Center45 min
🔒 Module 2+ — Subscription — coming soon. The rest of this track will be paid; Module 1 above stays free forever.

Low-Latency HFT Network Engineer

Module 1: Latency From Zero

Low-latency trading networks, no background assumed.

  1. What \"Latency\" Actually Means25 min
  2. What Trading Is (and Why Being Fastest Wins)25 min
  3. Why Microseconds Are Money30 min
  4. The Internet's Plumbing: Where Packets Actually Go30 min
  5. Why Trading Needs Its Own Special Network30 min
  6. The Cost of a Millisecond: Real Disasters30 min
  7. Your Roadmap: From Zero to Trading-Network Engineer35 min
🔒 Module 2+ — Subscription — coming soon. The rest of this track will be paid; Module 1 above stays free forever.