What is 802.1 QQ in Q encapsulation?

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Tags

1. #ethernet
2. #provider
3. #tunneling
4. #simple
5. #metro
6. #often
7. #layer
8. #unique
9. #customers
10. #receives
11. #pretty
12. #frames
13. #technique
14. #dot1q
15. #providers
16. #customer