What is double tagging attack?

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Tags

1. #connected
2. #belongs
3. #attacker
4. #switches
5. #removal
6. #tagging
7. #double
8. #types
9. #process
10. #interface
11. #hopping
12. #native
13. #unidirectional
14. #takes
15. #attack
16. #advantage
17. #which
18. #trunk