AAckLab

Start

OverviewLearn

Explore

LabsProtocolsOSI Map

Current Labs

Subnet VisualizerBinary ConverterTCP HandshakeOSI ModelDNS FlowRoutingARP Broadcast

Reference

Tools

Local MVP mode

Mock data only. Auth, payments, storage, and APIs are represented by contracts.

Learning workspace

Transport layer

TCP Socket Lab

Open a simulated connection, send data, inspect packets, and observe how TCP state changes.

TCP socket lab

Control the client. Watch connection state, packets, and acknowledgements change.

Ready to connect
client seq 1200server seq 8400

Client

10.0.0.12

CLOSED

Server

203.0.113.10

LISTEN

Received

waiting...

Timeline

0 packets

SYN - SYN-ACK - ACK will appear here.

Packet inspector

Packets appear after Connect.

Start

Click Connect to create SYN, SYN-ACK, and ACK packets.

Quick practice

Connect, send a short message, then inspect how ACK changes.