What is a file checksum?

Related questions

1. Is TCP checksum necessary or could TCP allow IP to checksum the data?
2. How do I verify checksum of a downloaded file?
3. How TCP checksum is calculated?
4. What is md5 in Linux?
5. What is Internet checksum?
6. Does TCP use checksum?
7. How many bytes are the checksum?
8. What are hashes used for?
9. What is checksum in transport layer?
10. Does UDP use checksum?

Tags

1. #introduced
2. #checksum
3. #during
4. #download
5. #small
6. #storage
7. #server
8. #received
9. #after
10. #detecting
11. #digital
12. #purpose
13. #usually
14. #transmission
15. #derived
16. #datum
17. #applied
18. #block
19. #installation
20. #sized
21. #errors