What are ports 20 and 21 used for?

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Tags

  1. #being
  2. #protocol
  3. #authority
  4. #description
  5. #between
  6. #connection
  7. #connections
  8. #second
  9. #created
  10. #first
  11. #internet
  12. #session
  13. #server
  14. #client
  15. #during