Domain names map website addresses to IP numbers, allowing users to access websites with easy-to-remember names like www.google.com rather than long strings of numbers. Disputes can arise when multiple parties claim rights to the same domain name. Types of disputes include infringement when a name resembles a trademark to profit off its reputation, concurrent claims when multiple legitimate users want the same name, and cybersquatting when names are registered solely to sell them to trademark holders. Courts examine factors like trademark strength and likelihood of confusion to resolve disputes. Famous cases include McDonald's reclaiming mcdonalds.com from an author and Microsoft disputing microsoft.com registrations.