You mean that the Windows version actually bases its authentication on something more robust than the source IP, a low port number, and who you claim to be and that it doesn't send potentially sensitive traffic over the wire in the clear?

Yes. From the docs:

TCP/IP Remote Utilities

The tools described in this appendix allow a network administrator to manage network computers from a distance. Many are similar to UNIX utilities. In This Appendix:

  • Finger
  • Ftp
  • Rcp
  • Rexec
  • Rsh
  • Telnet
  • Tftp

Note: All passwords used by Windows networking services are encrypted. However, the Ftp, and Rexec connectivity tools all rely on cleartext password authentication by the remote computer. Cleartext passwords are not encrypted before being sent over the network. This enables another user equipped with a network analyzer on the same network to steal a user's remote account password. For this reason, choose different passwords from those used for Windows 2000–based computers or domains when connecting to non-Microsoft remote computers with the Ftp, Rexec, or Telnet tools. Note that the protocols themselves prohibit encryption; cleartext passwords are not a standard that Microsoft encourages.

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In the absence of evidence, opinion is indistinguishable from prejudice.
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In reply to Re^5: Windows Service Pack Information by BrowserUk
in thread Windows Service Pack Information by martymart

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