what are ftp active mode and passive modes ?

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hi all

i don't know  active , passive modes ftp protocol.  can please introduce me update link these 2 concepts ? ( preferably links win 2008 or win 2008 r2 iis )

thanks in advance

ftp can run in active or passive mode, determine how data connection established, , controls connection, client or server. it's not windows 2008, r2, etc, rather industry standard. link whether windows, unix, or other vendor's ftp app, explain same exact thing.

in active mode, client sends server ip address , port number on client listen, it's telling server listen on. server initiates tcp connection.

in passive (pasv) mode client sends pasv command server , receives ip address , port number in return. client uses these open data connection server. is

beneficial in scenarios client behind firewall , unable accept incoming tcp connections.

file transfer protocol
http://en.wikipedia.org/wiki/file_transfer_protocol 

active ftp vs. passive ftp, definitive explanation
http://www.slacksite.com/other/ftp.html

active ftp vs passive ftp demistified part 1 - youtube
jul 19, 2010 - 5 min - uploaded balatutor
in 3 part video have explained difference between active , passive ftp. more ...
http://www.youtube.com/watch?v=bqrlbicm8le

 

btw - how studies , certification exams going? attending physical or online class, or studying through books?

ace

 

ace fekay
mvp, mct, mcitp enterprise administrator, mcts windows 2008 & exchange 2007 & exchange 2010, exchange 2010 enterprise administrator, mcse & mcsa 2003/2000, mcsa messaging 2003
microsoft certified trainer
microsoft mvp - directory services
complete list of technical blogs: http://www.delawarecountycomputerconsulting.com/technicalblogs.php

this posting provided as-is no warranties or guarantees , confers no rights.

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