Why do I have double NAT?

Related questions

1. What's a double NAT?
2. Do you need a static IP to port forward?
3. Is Plex a DLNA server?
4. Is port forwarding safe for gaming?
5. What is the point of port forwarding?
6. What is Port Triggering vs Port Forwarding?
7. Why open ports are dangerous?
8. How does Plex remote work?
9. What are port forwarding rules?
10. What language is Roku written in?

Tags

1. #games
2. #router
3. #sites
4. #tunnel
5. #playing
6. #connecting
7. #secure
8. #connect
9. #internet
10. #prevent
11. #private
12. #creating
13. #visiting
14. #behind
15. #specific
16. #devices
17. #another
18. #networks
19. #service
20. #different
21. #opening
22. #online
23. #access
24. #problems
25. #double
26. #cause