Free Course — No signup required

Networking
for Developers

DNS, HTTP, TCP/IP, load balancers, CDNs — you use these every day. Understanding them makes you a better developer and a better debugger.

5 lessons
Self-paced
~60 min/day
Free forever
Start Day 1 — Free → See what's covered
What you'll learn

Networking for Developers

DNS, HTTP, TCP/IP, load balancers, CDNs — you use these every day. Understanding them makes you a better developer and a better debugger.

  • Trace how a URL becomes a response — every step
  • Understand HTTP methods, headers, and status codes
  • Grasp TCP/IP, ports, and how data moves across the internet
  • Configure DNS records for your domains
  • Understand load balancers and CDNs at a practical level
5
practical lessons
7
OSI layers explained
$0
cost to take this course
Debug
network issues fast
5-Day Curriculum

Every lesson ships working code.
No theory without practice.

01
How the Internet Works
What happens when you type a URL: DNS lookup, TCP handshake, HTTP request, response, rendering. The full picture.
DNSTCPHTTPIP addresses
→
02
HTTP Deep Dive
Methods, headers, cookies, sessions, CORS, caching headers — everything you see in the Network tab of DevTools explained.
methodsheadersCORScache-control
→
03
TCP/IP and Ports
Understand IP addresses, subnets, ports, and how TCP ensures reliable delivery. Practical tools: curl, netcat, nmap.
IPportsTCP vs UDPcurl
→
04
DNS: How Names Become IPs
A, AAAA, CNAME, MX, TXT records explained. How to debug DNS issues, and how to configure a custom domain.
A recordsCNAMETTLdig
→
05
Load Balancers and CDNs
How load balancers distribute traffic, CDN edge nodes, HTTPS/TLS termination, and setting up Cloudflare.
load balancingCDNTLSCloudflare
→
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Your instructor
B
Bo Peng
Founder, Precision AI Academy

Kaggle Top 200 data scientist. Trained 400+ professionals across universities and federal agencies. Built production systems used by thousands. This course skips toy examples and gives you patterns that work in real projects.

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