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The number before the colon of the IP address is the same, but what is the difference behind it? Is it in the same place?
The IP address itself is a four-segment number from 0 to 255, without a colon.

The number after the colon is the port number.

Adding a colon to IP means opening the port of the machine.

The numbers before the colon of the IP address are the same, and the numbers after it are different, representing different ports of the same machine.