net.tcp protocal is not supported in wcf apps

The protocol 'net.tcp' is not supported.
I wrote like this in web.config file

<endpoint address="net.tcp://localhost:8080/Service" binding="netTcpBinding" contract="IService" bindingName="ReliableCommunication"></endpoint>


<bindings>
<netTcpBinding>
<binding name="ReliableCommunication">
<reliableSession enabled="true"/>
</binding>

</netTcpBinding>

</bindings>