Internet Connection!!!?

Hi,

I am having huge internet problems today, so I was playing online with my PS3 and it seems that it disconnected due to a "DNS Error" honestly, no idea what this means, but I can make a guess it's about the router or something.. I'm not a pro at setting up these things. But I want to see if I can fix it. I tried resetting the cicso e2000, and a rca modem box. It still said there was a DNS error.. and me being me, I took off all the cables and I forgot where to put them, I'm using my phone's internet on my laptop right now, and this is the only thing that might help me.

So, I can obviously tell where the power goes and stuff, but there is a yellow ethernet cable, a blue ethernet cable, and a white ethernet cable. I've played around with them trying them in different ports and connecting it to the modem and such, and it is still not working saying DNS error.

Also, my lying piece of **** step-father said Sprint gave him a internet booster, I'm like what, no way. He said some bullshit story on how it increases your speed. I read up on it a couple of minutes ago and the reason I could barely play a ******* game on PS3 was because it uses my internet, alot of it. Any help will be super appreciated.. I'm just at a freaking loss here.