Ajp12 vs Ajp13

[Andy C]

I'm confused.
When editing the server.xml file to use Ajp13 support
should I delete the AJP12 support or leave it in?

Is there a way to find out which Ajp is running on my server?

I.E should my server.xml be:

   <Connector className="org.apache.tomcat.service.PoolTcpConnector">
            <Parameter name="handler"
       value="org.apache.tomcat.service.connector.Ajp12ConnectionHandler"/>
            <Parameter name="port" value="8007"/>
  <Parameter
                 name="max_threads"
                 value="200"/>
              <Parameter
                 name="max_spare_threads"
                 value="20"/>
              <Parameter
                 name="min_spare_threads"
                 value="20" />
        </Connector>
  <!-- Apache AJP13 support.-->
  <Connector className="org.apache.tomcat.service.PoolTcpConnector">
   <Parameter name="handler"
value="org.apache.tomcat.service.connector.Ajp13ConnectionHandler"/>
   <Parameter name="port" value="8009"/>
 <Parameter
                 name="max_threads"
                 value="200"/>
             <Parameter
                 name="max_spare_threads"
                 value="20"/>
             <Parameter
                 name="min_spare_threads"
                 value="20" />
  </Connector>


Ta
Andy C