How To Fix An Ethernet Cord I Have A DNS Error On My New PS3 And Need Help Fixing It?

I have a DNS Error on my new PS3 and need help fixing it? - how to fix an ethernet cord

I have a Linksys wireless router in my house and my sister and I have wireless internet access via cell phone, the radio on my PS3 does not. Whenever I try to Internet IP addresses to connect to work, then the connection is not the DNS error. I tried to connect an Ethernet cable to solve the problem together, but it is the same. I've heard that other things on the screws the same IP address, but just need someone to play my game instructions on how to correct this error, DNS, troubling.