GA1 wrote: » Does the Troubleshooting exam test you on everything you learned in the ROUTE and SWITCH tests, or does it also cover additional material not covered in the other two? If it just tests, then the material one needs to learn is really covered by the other two tests (generally speaking). In other words, if you knew the ROUTE and SWITCH material very well, you wouldn't need to learn more info - just how to figure out problems at that point.