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Table Of Contents  The TCP/IP Guide
 9  TCP/IP Application Layer Protocols, Services and Applications (OSI Layers 5, 6 and 7)
      9  TCP/IP Key Applications and Application Protocols
           9  TCP/IP File and Message Transfer Applications and Protocols (FTP, TFTP, Electronic Mail, USENET, HTTP/WWW, Gopher)
                9  TCP/IP General File Transfer Protocols (FTP and TFTP)
                     9  Trivial File Transfer Protocol (TFTP)

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TFTP Options and Option Negotiation
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123
4
5
Next Page
 TCP/IP Electronic Mail System: Concepts and Protocols (RFC 822, MIME, SMTP, POP3, IMAP)
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TFTP Message Formats
(Page 4 of 5)

Error Messages

Error messages can be sent by either client or server in cases where a problem is detected in the communication. They have the format indicated in Table 238 and Figure 299.


Table 238: TFTP Error Message Format

Field Name

Size (bytes)

Description

Opcode

2

Operation Code: Specifies the TFTP message type. A value of 5 indicates an Error message.

Error Code

2

 

Error Msg

Variable

Error Message: A descriptive text error message string, intended for “human consumption”, as the standard puts it. J


Figure 299: TFTP Error Message Format

 

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 TCP/IP Electronic Mail System: Concepts and Protocols (RFC 822, MIME, SMTP, POP3, IMAP)
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