Do WiFi extenders really work?

Related questions

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2. What is the best WiFi Analyzer for Android?
3. Will a WiFi booster help speed?
4. Is a good wifi signal?
5. Is there an app to test WiFi signal strength?
6. How do I check my WiFi signal strength on my iPhone?
7. What is best WIFI booster?
8. What is the best channel to scan for WiFi?
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Tags

1. #cables
2. #wireless
3. #differently
4. #always
5. #interference
6. #susceptible
7. #repeaters
8. #electrical
9. #signal
10. #wired
11. #strong
12. #broadcast
13. #network
14. #extenders
15. #extender
16. #walls
17. #connection
18. #powerline
19. #means
20. #dedicated