Source Port number is the unique application identification number of the service/application at sender side which sending data to the receiver. Using this source port number the receiver thus can identify which service/application has send this packet and to which application/service the receir should reply to if necessary.
-- By MyNarutoAnime
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The port number is random
The client process needs a temporary port number. It tells the server to which port to reply (the TCP or UDP header includes information about the source and the destination port). The client, on the other hand, doesn't know in advance what port the server uses - unless the server uses a standard port number.The client process needs a temporary port number. It tells the server to which port to reply (the TCP or UDP header includes information about the source and the destination port). The client, on the other hand, doesn't know in advance what port the server uses - unless the server uses a standard port number.The client process needs a temporary port number. It tells the server to which port to reply (the TCP or UDP header includes information about the source and the destination port). The client, on the other hand, doesn't know in advance what port the server uses - unless the server uses a standard port number.The client process needs a temporary port number. It tells the server to which port to reply (the TCP or UDP header includes information about the source and the destination port). The client, on the other hand, doesn't know in advance what port the server uses - unless the server uses a standard port number.
What a client application usually selects for a TCP or UDP source port number is a random value. The value selected is generally in the range of the registered ports.
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Port 80
Information used are the source port number, the destination port number and ip addresses.
0532001700000001
The packet header source IP address and TCP header source port number
Source Port
A UDPheader contains four 16-bit fields. They are the source port, destination port, length, and checksum -- in that order.
source and destination port number or two applications communicating the data
By default, your minecraft port number is 25565, unless you've changed it this is your port number.