What r the types of groups in Router transformation?

A Router transformation has the following types of groups:
Input
Output
Input Group
TheDesi gner copies property information from the input ports of the input group to create a set of output ports for each output group.
Output Groups
There are two types of output groups:
User-defined groups
Default group
You cannot modify or delete output ports or their properties.
Two types of groups
user defined group
default group.