Yes the enroute controller charts overlay sector boundaries in red typically, along with usually a appendix box with letters a-z or whatever showing you shelves of airspace, with the appropriate letter being in appropriate boundary on the chart. As for this assignment, I don't know what they are looking for, stripmarking guides have been long out of date, with URET being used, and are really facility specific at this point if you are using strips for departure or arrivals. Not to mention I don't know what marking they want you to do, approach to expect, atis issued, and called into the tower (if there is one), are usually what we put down. I don't think CDC has any STARS so I guess you would just mark crossing MLF at 9500 for the ILS approach or something who knows, seems like a stupid assignment.