TCP vs UDP

The two languages of the internet. Do you want your data Perfect & Slow (TCP) or Fast & Messy (UDP)?

TCP (Transmission Control Protocol)

The "Reliable Courier".
Ensures every single byte arrives in order. If a packet is lost, it re-sends it. Requires a "Handshake" to start.

Used for: Web (HTTP), Email, File Transfers

UDP (User Datagram Protocol)

The "Fire Hose".
Blasts data as fast as possible. No receipts. No re-sends. If a packet drops, it's gone forever. Zero latency overhead.

Used for: Video Streaming, FPS Gaming, VoIP

🕹️ Protocol Wars Simulator

Experiment: Compare the transmission styles.
Notice how TCP forces you to wait for an ACK (Receipt) before sending again. UDP lets you spam the button, but you might lose data.

TCP Connection Connection-Oriented

Sender

Receiver

Strict Ordering Enforced

"Did you get the file?"
"Yes I got it."
"Okay sending next part."

UDP Stream Connection-Less

Sender

Receiver

Packet Loss Possible!

Sent: 0 Received: 0 Loss: 0%

📊 Head to Head

Feature	TCP	UDP
Reliability	100% Guaranteed. Re-sends lost data.	Best Effort. If it's lost, it's lost.
Ordering	Ordered. Packet 1 always arrives before Packet 2.	Chaotic. Packet 2 might arrive before Packet 1.
Speed	Slower (Handshakes + ACKs).	Light Speed. Low overhead.
Analogy	Certified Mail (Signature Required)	Shouting across a room