Internet Problems

Hi there, I have noticed my internet suddenly stop periodically every now and again. It isn't so bad to the point that i need to restart my modem. It fixes itself immediately, but it is still a pain and I would really appreciate it being fixed. I don't have a wireless router. I just have the modem plugged in via Ethernet cable straight to my PC.

Another problem I noticed is my ip address. I had some problems with it because when I would Troubleshoot Problems to fix my internet connection. it would say I have an invalid ip configuration. I recently found out that my ip apparently belongs to Phoenix, Arizona. I should mention I live in Nevada.

Any help is appreciated. Thank you.