This tweak is also valid for all Windows versions.
Sometimes during browsiing you can notice that it takes time to access any web page, and then, suddenly, your connection establishes full-speed again. The reason lays in amount of time it needs for tcp/ip protocol to translate a host name to an IP address. In order to fix this problem your xDSL modem shoud have an internal IP address specified in TCP/IP properties. For Win98 it would be TCP/IP bounded to NIC.
In most of the cases IP address would be 192.168.1.2; subnet mask : 255.255.255.0.
Hope it helps.