DNS is the internet standard naming system. Anytime you find a host on the internet unless you're entering the IP address, your machine is using DNS (domain naming system) to find the IP address associated with the name you typed. WINS is the Windows Internet Naming Service. WINS is only used by Pre-Win2k clients as a primary method of name-lookup.
There's really a lot more technical explaination to it, but in a nutshell, WINS is for name resolution on your LAN, and DNS is for name resolution on the internet. Note that Windows 2000 domains use DNS for all name resolution (LAN and internet) for Windows 2000 and later clients. Marc Creviere
WINS can be used (and profitably) by Windows2000 clients in a mixed NT4/Win9x environment, but in a purely Windows2000 environment it's not needed and adds unwanted complexity.
In short, DNS resolves <hostname>.<domain_name> to an IP address - for example, workstation1.somecompany.com
WINS only resolves <hostname>, or rather (more correctly), <netBIOS_name> to an IP address.
Generally speaking, the hostname and the netBIOS name is exactly the same, but you can have them different. the netBIOS name is whatever you give as the Computer Name. The Hostname and Domain Name is specified in the DNS tab of your Network Properties dialog box. MCSE NT4/W2K
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