My Broadband Modem has a built in DNS Server (and from memory, so does the wireless router). So there is no real need to install other dns software onto the computer if the modem is going to do it for me!
You can tell where the DNS server is on your network by the first two lines that come up when you enter a nslookup command.
Server: dns-cache-2.<name-of-your-ISP> Address: <IP-address-of-some-DNS-server-at-your-ISP>if the server is a local name, or the address is a private ip address, then the DNS server that you are using is a local one.
Still the program is a nice simple one to use (I installed it after reading this article!) and i recommend it to anyone that wants to have their own DNS lookup service!