this is a total beginner question. My question is about data that you can send to the server using $.get or $.getJSON or $.ajax (or other methods). I don't understand where this data is actually stored or how to access it. 

Let's say I have a file called test.json, that looks like this:

```
{
"name":"Bob",
"age":"84",
"sex":"male"
}

```

I want to display this data in an alert, as well as send new data to the server using $.getJSON, like so:

```
$(function() {
$.getJSON("ajax/test.json",{height:"tall",shoes:"sneakers"},
  function(data) {
      alert("Data Loaded:" +data.name);
  });
});

```

So the alert will display "Bob". However, if change the alert to ("Data Loaded:" +data.height); the alert will say "undefined". So this is a basic concept I'm not getting - where exactly is this data getting sent to and how do I then access it?