How to handle multiple incoming connections in Node.js?

I create a server with Node.js:

var net = require('net');

var PORT = 8181;

var server = net.createServer(

  function(socket) {
    console.log(this.address());

    socket.on('data', function(data) {
      var msg = data.toString().replace(/\n$/, '');
      console.log('got: ' + msg);
    });

    process.stdin.on('readable',

      function() {

        var chunk = process.stdin.read();

        if (chunk !== null) {

          socket.write(chunk);
        }
      }
    )

    socket.write('heyyo\n');
  }
)

Now, when multiple connections are coming in, this server sends out the typed in line only to the first connection.

I have two questions:

• 
  

  what is a standard way to handle this, i.e. to store the incoming sockets into an array?

  
  


• 
  

  exactly what happens that causes the readable event not to reach the other connections' callback function?