Windows – Keep lan connection alive while going to sleep

lansleepthinkpadwindows 7

Is it possible to keep lan connection alive when going to sleep? Although I would like a laptop independent(in general) answer, my laptop is Thinkpad T500 and the power manager shows in PCI options, the following three option regarding saving link state power: Off, moderate, maximum.
Also instant resume apparently does something different, so that isn't much help either.

I'm on Windows-7.

Here's why:

I'm a student, and currently I keep my laptop on almost all the time, but sometimes I sleep it and then I require to check something, so I turn it on. But then internet starts in at least a minute. So I avoid even putting it to sleep.
I want that the internet connection should persist, so that I can put it to sleep to avoid power consumption.

Best Answer

I don't think that the PC can continue Network activity while in sleep mode. If the issue is the PC going to sleep while downloading/using the network why not just disable the sleep mode? Maybe you already thought of that, but just checking ;)

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