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Hi All, This is a query related to the Subscribe and Notify signals in SIP.I know that these signals are irrespective to a call.But then there is a call-ID while decoding for this signal. 1.Can anyone tell me when this signal or message comes into the picture? 2. Importance of these two...

Hi All, This is a query related to Active FTP and Passive FTP.I would like to know that why is it defined in the FTP connection that for the data connection in ACTIVE FTP server will initiate the session whereas for PASSIVE FTP it is the client who initiate the connection? Secondly how is it...

Hi All, I know this question will sound little stupid but i still want to clarify since i am getting struck in one of my design. Kindly explain me how is the session negotiated? You can take an ex of any service : http, ftp etc.Starting from broadcast to syn, ack and everything. 2. If the...

Hi ALL, How r u? I was working on FreeBSD.I found a very strange thing in this O.S which is interesting as well as has many flaws. These is a concept of concatenating all the hard drives and making a new logical partition which has the capacity as the total summation of all the physical drives...

Hi All, Can anyone let me know the complete process of packet capturing and decoding or analysing through the packet capturing tools? Kindly let me know the detailed information: 1. How the stealth mode works? 2. How layer wise packet decoding takes place?What all engines are there? 3. Most...