Answer:
In Device Manager, open the Properties box of the network adapter and click the Power Managerment tab. Check Allow this device to wake the computer and click OK.
Wake on LAN allows wired or wireless network activity to power up a computer or wake it up.
For A+ Guide to Hardware [Managing, Maintaining, and Troubleshooting] **Fifth Edition** page 555 question 15 of review questions the answer relating to this question is:
1. Enable it in the BIOS
2.Go to network adapter => properties => power management tab
3. Check allow this device to wake the computer and press ok.