The other prominent name service, WINS (Windows Internet Name Service) is a modified Microsoft Access database. Its job is to map NetBIOS names to IP addresses when in a NT environment. Generally self tuning and repairing after installation, in an NT only server network, it grants NetBIOS names to be used when TCP/IP is the transport, without the need for HOST or LMHOST files. When a request is made by MS NetBIOS device name, WINS returns the IP address for the device.
WINS is tightly tied to DHCP in NT4. (DHCP is the service which automatically assigns network addresses to a computer when it boots. Well discuss it later in the chapter.) When activated on a Windows based network that is using DHCP to assign IP addresses, the WINS database is updated by DHCP when each address is assigned. Prior to Windows 2000, this was a major advantage for WINS over DNS, because earlier versions of DNS could not update themselves on the fly as host addresses were assigned.
Not until Windows 2000s DDNS (Dynamic DNS) did DNS catch up with this ability that WINS has had for years.
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