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source port field (SP)

The source port field (SP) in the TCP protocol header has the same meaning as in the User Datagram Protocol (UDP).

Source port field in the TCP header

Source port field in the TCP header

Source port field has a length of 16 bits and contains the port number of the application layer service that sent this datagram.

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Englisch: source port field - SP
Updated at: 11.03.2008
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Translations: DE