Packets march blindly across the network. Give them jobs so enough of them reach the server.
Turn your phone sideways for a bigger board.
Deliver enough packets to unlock the next network.
Seven layers, each with one job. Data travels down the stack to be sent and back up to be received.
Enter your name and the class code your teacher gave you. When your teacher asks, copy your result code and send it to them — no account, nothing uploaded.