Scott VE3QBZ on Nostr: The packet node can actually be thought of as a network switch, because that's what ...

The packet node can actually be thought of as a network switch, because that's what it does - in addition to handling the I/O from the user and the script in this case, it will also fill AX.25 packets to their configured MTU size, ensure they get delivered, etc, just like a real switch. So that's all invisible to you as a layer7 app doing simple text I/O; you just write to the console, and the node handles the rest (via a socket, obviously, but even that is handled via systemd upstream of you)