What is the purpose of checksum TCP field?

Related questions

1. What is difference between CRC and checksum?
2. What is my checksum?
3. What is md5 in Linux?
4. Why does the IP checksum cover just the header?
5. How does CRC checksum work?
6. What is checksum error?
7. Why do we use checksum?
8. How is the UDP checksum calculated?
9. How is checksum of IP header calculated?
10. What is md5 command?

Tags

1. #system
2. #hardware
3. #integrity
4. #speeds
5. #summary
6. #decrease
7. #checksum
8. #completely
9. #1gbps
10. #layer
11. #improve
12. #network
13. #being
14. #essential
15. #computation
16. #higher
17. #ensure
18. #function
19. #across
20. #offloaded
21. #partially
22. #performance