Network disconnect when in sleep mode

Hi all.
Since I've installed Mountain Lion, any time the computer goes into sleep mode, networking do the same: I cannot download files, when the computer wakeup I have to wait the reconnection before being able to use mail, safari or ather network stuff.
I did not find any option to set, telling the computer waht to do when in sleep mode.
WIth Lion and preceding OsX this was not an issue.
Is there anything I can do?
Thanks.
Federico.

Hi,
Yes, clear "Allow the computer to turn off this device to save power" in the properties of network adapter\Power management as mentioned in the link provided by arnavsharma, and check if the issue persists.
Yolanda Zhu
TechNet Community Support

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