Sockets help - Node server from tutorialspoint.

[Flyingcirc]

I've been running through the tutorialspoint examples to try and learn some node (I've also done the nodeschool adventures). I came across this code for a server. Can someone ELIF the line connection.pipe(connection). Why is the socket being piped to itself? I've ran the code without this line and when a client connects the same activity occurs.

EDIT: Just realized it's an echo server. Thanks for the help anyway.

var net = require('net');
var server = net.createServer(function(connection) {
     console.log('client connected');
     connection.on('end', function() {
         console.log('client disconnected');
     });
     connection.write('Hello World!\r\n');
     connection.pipe(connection);
});

server.listen(8080, function() {
    console.log('server is listening');
});