Host name
1 - 66 characters, one or more character strings, separated by dots (periods).
- Input must consist of one or more labels, separated by a period.
- Each label must begin with a letter or digit and have at least 1 character.
- Every character after the first must be a letter, number or hyphen.
- The name must be fully qualified (it must have a domain name and a host name concatenated together.)
- Host names that are not fully qualified are rejected.
For example:
mycomputer.city.company.com