Wireless Range Extender N300

General

• I have multiple networks because I use a range extender. Do my devices automatically select a network?
• Despite installing a range extender I have a weak signal in part of my home. What can I do?
• What factors can affect the speed of my network?
• I can connect through my range extender, but I see that the speed is halved. What is causing this?
• I am experiencing a slow internet connection. What could the problem be?