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Article ID: 102737 - Last Review: December 6, 2003 - Revision: 3.0

This article was previously published under Q102737


Windows NT supports both file transfer protocol (FTP) and trivial file transfer protocol (TFTP) under its implementation of TCP/IP. Both of these protocols can be used for transferring files across the Internet. The differences between the two protocols are explained below:

  • FTP is a complete, session-oriented, general purpose file transfer protocol. TFTP is used as a bare-bones special purpose file transfer protocol.
  • FTP can be used interactively. TFTP allows only unidirectional transfer of files.
  • FTP depends on TCP, is connection oriented, and provides reliable control. TFTP depends on UDP, requires less overhead, and provides virtually no control.
  • FTP provides user authentication. TFTP does not.
  • FTP uses well-known TCP port numbers: 20 for data and 21 for connection dialog. TFTP uses UDP port number 69 for its file transfer activity.
  • The Windows NT FTP server service does not support TFTP because TFTP does not support authentication.
  • Windows 95 and TCP/IP-32 for Windows for Workgroups do not include a TFTP client program.

  • Microsoft Windows NT Advanced Server 3.1
  • Microsoft Windows NT Workstation 3.1
  • Microsoft Windows NT Workstation 3.5
  • Microsoft Windows NT Workstation 3.51
  • Microsoft Windows NT Server 3.5
  • Microsoft Windows NT Server 3.51
  • Microsoft TCP/IP for Windows for Workgroups 3.11
  • Microsoft TCP/IP for Windows for Workgroups 3.11a
  • Microsoft TCP/IP for Windows for Workgroups 3.11b
  • Microsoft Windows for Workgroups 3.11
  • Microsoft Windows 95
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