If you feel that your Att U-verse or other ISP is painfully slow: manually change your DNS settings. Go to /etc/resolv.conf or make '/etc/resolv.conf.head' file, which will apply any changes to the top of the resolv.conf file. (a tail file is also possible).
DNS server is used to resolve domain name into IP address. There are three common DNS server configurations can be done using BIND, caching nameserver, pri