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How many total number of ports are there?
65535 Total ports
32768 TCP ports
65536 Total ports
32768 UDP Ports
There are a total of 65536 TCP ports. The ports are numbered 0-65535. Although port 0 is reserved and unavailable for direct use, it still exists and can be counted in the total number of ports.
http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml
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