Published video
Internet A-Z
What is TCP and UDP?
DNS gives us the address. Routers show us the path. But how does data actually travel? Should it be delivered reliably? Or as fast as possible? In this episode of Internet A–Z, we break down the two fundamental transport protocols that power the Internet: • TCP (Transmission Control Protocol) • UDP (User Datagram Protocol) You’ll learn: What “connection-oriented” really means How the 3-way handshake works What retransmission and acknowledgements do How TCP controls congestion Why UDP is faster but less strict When applications choose speed over reliability What port numbers are and why they matter By the end of this episode, you’ll clearly understand the difference between TCP and UDP — and how they fit into the Internet’s layered architecture. Next episode: HTTP vs HTTPS — understanding communication at the application layer. If you want to truly understand how the Internet works — not just use it — this series is for you. Happy Networking.