Originally from http://turkdirlik.com/wifi-extender-reviews/
The wifi extender should feature the latest wireless security features to help prevent unauthorized access to your wireless network.
Regardless of your devices, the gadget should utilize the best encryption for wireless security.
Quick and easy installation is a feature of a quality device. It will also come with instructions concerning the best distances to place your wifi extender from the router, helping you achieve the best performance and coverage.
More at Network security