- `ExtendedResolver`: a resolver that uses multiple `SimpleResolver`s to send

the queries. Can be configured to query the servers in a round-robin order.

Blacklists a server if it times out.

`https://dns.google/query`.

The project [dnssecjava](https://github.com/ibauersachs/dnssecjava) has a

<groupId>dnsjava</groupId>

<artifactId>dnsjava</artifactId>

<packaging>bundle</packaging>

<name>dnsjava</name>

<description>dnsjava is an implementation of DNS in Java. It supports all defined record types (including the DNSSEC

types), and unknown types. It can be used for queries, zone transfers, and dynamic updates. It includes a cache

<connection>scm:git:https://github.com/dnsjava/dnsjava</connection>

<developerConnection>scm:git:https://github.com/dnsjava/dnsjava</developerConnection>

<url>https://github.com/dnsjava/dnsjava</url>

</scm>

<developers>

<developer>