What do you mean by firewall?

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Tags

1. #users
2. #intranets
3. #either
4. #software
5. #implement
6. #designed
7. #combination
8. #system
9. #internet
10. #prevent
11. #unauthorized
12. #access
13. #accessing
14. #especially
15. #networks
16. #network
17. #hardware
18. #firewalls
19. #connected
20. #private
21. #firewall