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Understanding Trivial File Transfer Protocol (TFTP) for Efficient Data Transfer

Explore TFTP messages, connection establishment, data transfer, UDP ports, examples, options, security, and applications. Discover TFTP's usage with UDP port 69 and its applications in different scenarios.

thaddeus-shaffer
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Understanding Trivial File Transfer Protocol (TFTP) for Efficient Data Transfer

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  1. Chapter 21 Trivial File Transfer Protocol (TFTP)

  2. CONTENTS • MESSAGES • CONNECTION • DATA TRANSFER • UDP PORTS • TFTP EXAMPLE • TFTP OPTIONS • SECURITY • APPLICATIONS

  3. TFTP uses the services of UDP on the well-known port 69.

  4. 21.1 MESSAGES

  5. Figure 21-1 Message categories

  6. Figure 21-2 RRQRead request Mode: netascii or octet

  7. Figure 21-3 WRQWrite request

  8. Figure 21-4 DATA format

  9. Figure 21-5 ACK format

  10. Figure 21-6 ERROR format

  11. 21.2 CONNECTION

  12. Figure 21-7 Connection establishment

  13. 21.3 DATA TRANSFER

  14. Figure 21-8 Sorcerer’s apprentice bug

  15. 21.4 UDP PORTS

  16. Figure 21-9 UDP port numbers used by TFTP

  17. 21.5 TFTP EXAMPLE

  18. Figure 21-10 TFTP example

  19. 21.6 TFTP OPTIONS

  20. 21.7 SECURITY

  21. Figure 21-11 TELNET with FTP for security

  22. 21.8 APPLICATIONS

  23. Figure 21-12 Use of TFTP with BOOTP

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