TCP Congestion Visualizer

Buffer Occupancy: 0/100

Current RTT: 50ms

Queueing Delay: 0.00ms

Sender A CWND: 1

Sender B CWND: 1

TCP State A: Slow Start

TCP State B: Slow Start

Packets Dropped: 0

Link Utilization: 0%

Speed: 1x

Keyboard: Space Play/Pause | ← Fast | ↓ Normal | → Slow

Buffer Configuration

Buffer Mode:

Auto (BDP) Manual Adaptive

Buffer Size: packets

Current: 8 packets

About This Visualization

This demonstrates TCP's AIMD (Additive Increase, Multiplicative Decrease) congestion control algorithm. Two senders compete for the same bottleneck link, each increasing their congestion window linearly until packets are dropped at the router buffer, then halving the window—creating interleaved "sawtooth" patterns.