Using ubuntu 11.04, I run netstat -nplt the results for local address may be 

```
localhost:6666

```

or 

```
[::]:6666

```

What is the difference? 

I believe that the [::]: binds the service at port xxxx to all interfaces, (lo, eth0, eth1 ) and localhost: only binds it to loopback interface (lo). I think I am missing something. How can I toggle between the two states?