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Chapter 21. Trivial File Transfer Protocol (TFTP). CONTENTS. MESSAGES CONNECTION DATA TRANSFER UDP PORTS TFTP EXAMPLE TFTP OPTIONS SECURITY APPLICATIONS. TFTP uses the services of UDP on the well-known port 69. 21.1. MESSAGES. Figure 21-1. Message categories.
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Chapter 21 Trivial File Transfer Protocol (TFTP)
CONTENTS • MESSAGES • CONNECTION • DATA TRANSFER • UDP PORTS • TFTP EXAMPLE • TFTP OPTIONS • SECURITY • APPLICATIONS
21.1 MESSAGES
Figure 21-1 Message categories
Figure 21-2 RRQRead request Mode: netascii or octet
Figure 21-3 WRQWrite request
Figure 21-4 DATA format
Figure 21-5 ACK format
Figure 21-6 ERROR format
21.2 CONNECTION
Figure 21-7 Connection establishment
21.3 DATA TRANSFER
Figure 21-8 Sorcerer’s apprentice bug
21.4 UDP PORTS
Figure 21-9 UDP port numbers used by TFTP
21.5 TFTP EXAMPLE
Figure 21-10 TFTP example
21.6 TFTP OPTIONS
21.7 SECURITY
Figure 21-11 TELNET with FTP for security
21.8 APPLICATIONS
Figure 21-12 Use of TFTP with BOOTP
