###### tags: `Networking` # TCP 3-way Handshake ```mermaid sequenceDiagram Note left of Client: Send `SYN` (seq=m) Client->>Server: SYN Note right of Server: Receives `SYN` (seq=m)<br>Send `SYN` (seq=n) <br> Send `ACK` (ack=m+1) Server-->>Client: SYN+ACK Note left of Client: Receives `SYN` (seq=n) <br>Receives `ACK` (ack=m+1) <br> Send `ACK` (ack=n+1) Client->>Server: ACK Note right of Server: Receives `ACK` (ack=n+1) ``` :::success :bulb: **[leonuz](https://leonuz.github.io)** :::