How to let my macbook air mini connect the Internet automatically?

[Marga Calon]

Hello, everyone, i'm a new comer, maybe what I asked is a little stupid, but i really want to solve it instantly. I don't know who used my Macbook air mini and changed my wifi settings, I have to set the right IP address manually when I changed a place to surf the Internet. I think it's really a trouble! How to let my macbook air mini connect the Internet automatically?

 

[MagicBoy]

Sorry, don't understand that.

 

[McBain]

Macbook air mini?

If you simply mean to automatically retrieve an IP address;

System preferences -> network -> Select network connection type (IE WifI) -> Advanced -> TCP/IP Tab -> Configure IPv4 -> Using DHCP -> OK -> Apply.