Are firewalls necessary?

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Tags

1. #software
2. #computer
3. #already
4. #types
5. #hardware
6. #built
7. #security
8. #because
9. #essentially
10. #router
11. #connects
12. #protected
13. #there
14. #firewall
15. #probably
16. #internet
17. #firewalls
18. #using