Question : How nslookup multi IP address?

I want to know what the  reason in case multi IP for 01 domain ?

If A software want to access a domaie, it connect to only one IP?
or If the software not found a IP, it will connect other IP?

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C:\>nslookup
Default Server:  UnKnown
Address:  192.168.1.1

> yahoo.com
Server:  UnKnown
Address:  192.168.1.1

Non-authoritative answer:
Name:    yahoo.com
Addresses:  209.191.93.53, 69.147.114.224, 209.131.36.159

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Thanks in advanced :)

Answer : How nslookup multi IP address?

nope, when your browser requests for a yahoo it is provided by one of the ips and after the expiration in local cache (on a pc and nearest dns cache) yahoo can be resolved to a different ip.
in this way you can load share traffic between several locations