truenorth, my desktop computer is the "master" (computer hard wired to the router) and my laptop "slave" feeds through the router by, I think the term is, WI-FI?
Again, the terms master and slave have no relevance here. Just because your desktop is connected to the router by cable does not make it "master" nor does your laptop become "slave" by virtue of a wireless connection to the router.
Furthermore, you're referring to truenorth's comment but you aren't even using the terms master and slave in the same sense as him. He was referring to printers but you're talking about the computers themselves, not the printers.
"master" and "slave" usually refers to the common scenario of two drives (hard or optical) connected to the same data cable which connects the drives to the motherboard. The terms simply are not generally used terminology in connection with printers or cable vs. wireless connection to a router. The terms have meaning with reference to drives; they have no meaning here.