Suggestion 7: Change from WEP to WPA/WPA2  

Note: This Option requires you to login to your router and is for more advanced users.

WEP and WPA/WPA2 are security algorithms that keep hackers from breaking into your network. The only problem is that WEP ("Wired Equivalent Privacy") is a lot less secure than WPA/WPA2 ("Wireless Protected Access").[4] So if you're still running your internet through WEP instead of WPA/WPA2, consider changing so that unwanted forces don't break into your network.

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https://lifehacker.com/the-10-best-ways-to-boost-your-home-wifi-5931743