What is a domain name?

Once a domain name has been established, "subdomains" can be created within the domain. For example, the domain name for a large company could be "bigco.com" and within this domain, subdomains can be created for each of the company's regional offices. The structure for this is:

describes a single host computer named tiger, in the New York office of the Bigco Company. Not all domain names will have a hostname and subdomain. In addition, more than one subdomain can be assigned.