六ヶ所核燃料再処理工場による放射性廃液の放流記録@ウィキリスト | ウィキリスト powered by アットウィキTo keep it simple, A subdomain is an additional part to your main domain name. An example of this would be dom.ain.studio where studio is the Top Level Domain (TLD), ain is the Second Level Domain (SLD), and dom is the sub domain. By using suffixes, we can generate exponentially more potential subdomains.
