Is GRE tunnel encrypted?

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Tags

1. #tunneling
2. #multicast
3. #downside
4. #allow
5. #routing
6. #unicast
7. #sites
8. #different
9. #protocols
10. #routers
11. #tunnel
12. #between
13. #often
14. #clear
15. #broadcast
16. #traffic
17. #protection
18. #offers
19. #tunnels
20. #encrypted
21. #ipsec