The LDAP client software returns fully qualified host names for host lookups, such as host names returned by gethostbyname() and getaddrinfo(). If the name stored is qualified, that is, contains at least one dot, the client returns the name as is. For example, if the name stored is hostB.eng, the returned name is hostB.eng.
If the name stored in the LDAP directory is not qualified (it does not contain a dot), the client software appends the domain part to the name. For example, if the name stored is hostA, the returned name is hostA.domainname.