Why proxy server is needed?

Related questions

1. Is WhatsApp really secure?
2. Why are proxy servers important?
3. Are proxy servers safe?
4. How can I earn money from Whatsapp?

Tags

1. #reasons
2. #server
3. #internet
4. #between
5. #client
6. #anonymous
7. #proxy
8. #address
9. #security
10. #computer
11. #access
12. #intermediary
13. #unexpected
14. #attack
15. #prevent
16. #mostly