On the Render Accelerator component tab, there is a button for opening the Resource Details window where you will find information about each resource in the rendering network:
The information listed for each resource is the following: computer ID, state, (protocol/address/port) used for communication with it, and whether it has been automatically or manually added.
Green indicates that the resource is answering and seems to be okay. This check is done every 10 seconds). Red indicates that the resource is not answering or that it is answering strangely.
The two buttons at the bottom of the window are for adding or removing a resource. To add a resource to the network, you must be on the same subnet. Then you need to enter the computer name or the IP address of the computer that you wish to add. Remove can be used for removing resources that have been manually added, but is grayed out and cannot be used for automatically added resources.