there is no mouse or keyboard activity.
Once asleep, you will lose network connectivity.
Of course, you could always set the sleep time to longer than you think the process will take or you could turn off sleep altogether.
If the monitor, by itself, goes to sleep, you do not lose network conectivity
I am planning on transferring a large amount of files from one Mac running OS 10.4 to one running OS 10.5 via my wireless network using the file-sharing option on both computers. Will turning the file-sharing options on disable idle-sleep for both computers so the transfer can be completed properly? Thanks in advance for your help!