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Electrical Engineering/TCP/IP and UDP Port Numbers Nomenclature.

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Question
Dear Prof Cleggsan

http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
http://www.webopedia.com/quick_ref/portnumbers.asp
http://www.stengel.net/tcpports.htm


1. As we see port numbers 4, 6, 8, 10, 12, 14, 16, 26, 40 ....
were kept as Unassigned, would like to know the reason for the same i.e. why those numbers were skipped ?.

2. If a new TCP/IP OR UDP Application or Service or protocol is designed and developed, Can we use these above Unassigned ports ?.

3. As we see the Maximum port number value is 61000, so If a new TCP/IP OR UDP Application or Service or protocol is designed and developed, Should we use 61001 as the port number ?.   


Thanks & Regards,
Prashant S Akerkar

Answer
Don't know the answer to this question.

But, I believe the answer lies in this web page:

http://www.adminsub.net/tcp-udp-port-finder/unassigned

It says these unassigned numbers are due to potential threats but are being used in some cases by special users.  Please refer to the explanations outlined in the portfinder above.

That's all I can offer. If you need more, please refer your question to allexperts in computer software systems.  

Electrical Engineering

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cleggsan

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All technical areas of Electronics Engineering.

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BSEE, MBA, Design, R&D, University Research.
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IEEE, Consumer Electronics Society, Audio Engineering Society.
Broad teaching experience; work experience mostly in consumer electronics and conversion from analog to digital technologies. Pioneer in digital audio at all levels.

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BSEE (Equiv) BYU BSEE University of North Dakota MSBA (MBA) Illinois State University Graduate Studies in Computer Science - Bradley University Graduate Studies - Ohio University Graduate Studies - University of Missouri Kansas City DeVry Tech - Electronics

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