host name

host name
The host name is the unique name that identifies a computer on a network.
On the Internet, the host name is in the form comp.xyz.net. If there is only one Internet site, the host name is the same as the domain name.
One computer can have more than one host name if it hosts more than one Internet site (for example, home.xyz.net and comp.xyz.net). In that case, home and comp are host names and xyz.net is the domain name.
Valid characters consist of:
  • Numbers in the range of 0…9
  • Alpha characters in the range of A…Z (upper or lower case)
  • dash
  • period
  • No more than 64 valid ASCII characters
  • The first character of the host name must be an alpha character (in the range of A…Z (upper or lower case))
  • The last character of the host name cannot be a period or a dash
  • The host name cannot contain two periods next to each other
Examples of legal host names include:
  • HostName.com
  • HostName
  • HostName.123
  • Host-2-Name.com
  • HostName.DomainName.com
  • Host123Name456.789DomanName000.com
Examples of illegal host names include:
  • .HostName.com
  • HostName.com.
  • HostName..com
  • HostName.com-
  • 123.com
  • 1234567890
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