this might be a stupid question. but i've heard it said that if you upgrade your wireless network that it will only run as fast as the slowest computer on that network. so for instance, i'm thinking of a new macbook pro with the wireless n card and also getting a wireless n router. i will also have 3 desktop computers connected through cat5. but i'll have a 5th computer still using an old 802.11b wireless connection. but i really have little interaction with that computer. now obviously, if i try to connect to the old wireless computer i can only go as fast as it's connection. but what if i'm transfering files from the desktops that have a faster connection into the laptop? will i get wireless N speeds since the 5th, slow computer, is not part of the transfer? on that same note i'm thinking of upgrading my 10/100 router to a 10/100/1000 router. do all my desktops on the network need new network cards? or can i upgrade only the two that will be transfering with each other the most? it would be pointless to upgrade 2 of the machines if the 3rd keeps the whole network still at 10/100 even though it's not involved in the process much. i'm fairly confident that it only slows to the slowest computer involved in the transfer, not to the slowest computer on the network, even if it's sitting idle. but my searches on google mostly just turned up questions about a router to the outside and gigibit switches for internal traffic. anyway, possibly stupid questions that i didnt know the answer to.