When I close my Retina Macbook Pro's lid and put it to sleep, I have noticed that it periodically must "wake" and check the internet or connect to Wi-Fi when I expect it to be sleeping. This has been consistent for me even with my previous MacBook Pro, too.
I see this because my Gmail tab in Chrome will have new emails preloaded, before the Wi-Fi connection is reenabled. Or when I have an IRC client open, I'll see multiple join/disconnects in the log.
pmset -g sched does not print anything.
How can I stop it from doing this?