[ih] Why FTP uses two ports?

[John Day]

I was wondering about that when I wrote it.  I guess by the time SMTP 
was extracted from FTP, the TIPs were mainly gone or TIPServ was in 
use and there were only programs using it.  There was nothing in FTP 
that assumes Telnet either.

It was CCNRJE, Campus Computing Network at UCLA, authored by Bob 
Braden for the 360/91.  The two RJEs definitely did.

Take care,
John

At 9:24 -0400 2012/06/21, Louis Mamakos wrote:
>On Jun 21, 2012, at 6:51 AM, John Day wrote:
>>
>>
>>  BTW, I know that many textbooks and well-known
>>  professors describe Telnet as a remote login
>>  protocol.  It isn't.  It is a terminal device
>>  driver protocol.  This is why this class of
>>  protocols use to be called virtual terminal
>>  protocols.  Remote log in is one application
>>  built using Telnet.  Telnet was also used in FTP,
>>  RJE, CCNRJE, and SMTP.
>>
>>  Take care,
>>  John
>
>Strictly speaking, at least SMTP did not use the
>TELNET protocol, as FTP did for it's control connection.  I
>recall implemented IAC escaping when I built my FTP server's
>control connection handling. I don't know about RJE,
>CONRJE personally.
>
>Louis Mamakos