Depends on the provider, whether they require PPOE or some other authentication method. But with any PC, you should not connect it directly to a DSL or cable modem. Buy a Dlink/linksys/netgear 'router' and connect the PC to that. In that case, the windows pc will only need an ethernet card and tcp/ip installed (don't remember if it was installed by default back then). windows 98 is far from secure and would be easily hacked if directly connected.