TCP vs UDP Explained: Reliable vs Fast (and When to Use Each)
TCP or UDP? In under 5 minutes we decode the two transport protocols: how they both deliver data to the right app using ports, why TCP is reliable and ordered (handshake, acknowledgements, retransmission) while UDP is fast and lightweight (no handshake, best effort), the trade-off side by side, and exactly when to use each, web/email/files versus streaming/voice/gaming/DNS. Clear and visual. Great for anyone studying Network+, Security+, or building real systems.
This is Episode 6 of the Networking Fundamentals series on Envision Decoded, one technical concept, clearly explained.
Chapters
0:00 Intro
0:20 TCP and UDP: the two transports
0:30 Their job: deliver to the right app
1:08 TCP, the reliable one
1:33 UDP, the fast one
1:53 The trade-off, side by side
2:12 When to use which
2:41 Recap
3:02 What's next: the TCP handshake
Catch up on the series from Episode 1:
• Networking Fundamentals
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