Welcome to LQ.
The network settings are similar to windows. DNS and DHCP server here mean the same no matter what platform you use.
DNS is a domain naming system which will resolve your domain name to its valid IP address like www.google.com
A DHCP is dynamic host configuration protocol where server can provide client with network information like IP address.
Now if you can tell us what kind of configuration you have in windows, it would be easy to do the same in Ubuntu which is pretty easy.
To see if your wired network interface has been properly diagnosed use the command
and paste the output in Code
Also give the output of
in code tags.