<P> FTP does not encrypt its traffic ; all transmissions are in clear text , and usernames , passwords , commands and data can be read by anyone able to perform packet capture ( sniffing ) on the network . This problem is common to many of the Internet Protocol specifications ( such as SMTP , Telnet , POP and IMAP ) that were designed prior to the creation of encryption mechanisms such as TLS or SSL . </P>
what information is displayed in clear text from the ftp header
all transmissions