I noticed that `dig google.com` produces four distinct IP addresses. What does that mean? It could be

* use any, doesn't matter
* try the first, if it doesn't respond, try the next (and so forth)
* or ...?

Or is this just supposed to be round-robin? (If so, why would it return 4 values, instead of just 1?)

I'm sort of hoping it means that browsers would try all four in sequence until they got one that works.

Here's what I'm getting: `dig google.com`:

```
;; QUESTION SECTION:`
;google.com.            IN  A

;; ANSWER SECTION:
google.com.     293 IN  A   74.125.19.99
google.com.     293 IN  A   74.125.19.103
google.com.     293 IN  A   74.125.19.104
google.com.     293 IN  A   74.125.19.147

;; AUTHORITY SECTION:
google.com.     81797   IN  NS  ns2.google.com.
google.com.     81797   IN  NS  ns4.google.com.
google.com.     81797   IN  NS  ns1.google.com.
google.com.     81797   IN  NS  ns3.google.com.

;; ADDITIONAL SECTION:
ns1.google.com.     255049  IN  A   216.239.32.10
ns2.google.com.     230304  IN  A   216.239.34.10
ns3.google.com.     231860  IN  A   216.239.36.10
ns4.google.com.     58735   IN  A   216.239.38.10`

```