> No, the server will try to send an event, and the server will notice the connection has dropped. The client will still have no idea until some sort of timeout

> No, the server will try to send an event, and the server will notice the connection has dropped. The client will still have no idea until some sort of timeout is reached, as the client will usually not be sending any data over the connection, as the connection's sole purpose is for the server to send events to the client. Exactly why mqtt has the ping packet for the client.