TCP Protocol Interactive Demo

Interactive visual demonstrations of TCP three-way handshake, reliable transmission, flow control, congestion control and four-way handshake to intuitively understand TCP protocol core mechanisms.

Three-way Handshake Adventure

Client
State:
CLOSED
Server
State:
CLOSED
Network

Learning Panel

Why Three-way Handshake?

The three-way handshake ensures both parties confirm each other's send and receive capabilities. Two-way cannot prevent old duplicate connections from causing confusion.

Knowledge Check

1 / 3

How many packets are exchanged in TCP three-way handshake?