for debug
Iterates over all IP addresses for name retrieved from the hosts file.
Iterates over all hostnames for address retrieved from the hosts file.
Iterates over all IP addresses for name retrieved from the DNS resolver.
name can be a Resolv::DNS::Name or a String. Retrieved addresses will be a Resolv::IPv4 or Resolv::IPv6
Iterates over all hostnames for address retrieved from the DNS resolver.
address must be a Resolv::IPv4, Resolv::IPv6 or a String. Retrieved names will be Resolv::DNS::Name instances.
Iterates over all typeclass DNS resources for name. See getresource for argument details.
Iterates over all IP addresses for name retrieved from the mDNS resolver, provided name ends with “local”. If the name does not end in “local” no records will be returned.
name can be a Resolv::DNS::Name or a String. Retrieved addresses will be a Resolv::IPv4 or Resolv::IPv6