# phpman > perldoc > Net::DNS::FAQ

## NAME
    [Net::DNS::FAQ](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ADNS%3A%3AFAQ/markdown) - Frequently Asked [Net::DNS](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ADNS/markdown) Questions

## SYNOPSIS
        perldoc [Net::DNS::FAQ](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ADNS%3A%3AFAQ/markdown)

## DESCRIPTION
    This document serves to answer the most frequently asked questions on both the [Net::DNS](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ADNS/markdown) Mailing
    List and those sent to the author.

    The latest version of this FAQ can be found at <<http://www.net-dns.org/docs/FAQ.html>>

## GENERAL
  What is [Net::DNS](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ADNS/markdown)?
    [Net::DNS](https://www.chedong.com/phpMan.php/perldoc/Net%3A%3ADNS/markdown) is a perl implementation of a DNS resolver.

## INSTALLATION
  Where can I find [Test::More](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3AMore/markdown)?
    [Test::More](https://www.chedong.com/phpMan.php/perldoc/Test%3A%3AMore/markdown) is part of the Test-Simple package, by Michael G Schwern. You should be able to find
    the distribution at <<http://search.cpan.org/dist/Test-Simple/>>

## USAGE
  Why does $resolver->query() return undef when the answer section is empty?
    The short answer is, do not use query(). $resolver->send() will always return the response
    packet, as long as a response was received.

    The longer answer is that query() is modeled after the res_query() function from the libresolv C
    library, which has similar behavior.

## VERSION
     $Id: FAQ.pod 1709 2018-09-07 08:03:09Z willem $