Answer / naveen

Each hardware can interact with the other with a specific
path dedicated for it during its installation. That path is
decided either by the processor or by manually.

For eg. consider the port where you install the mouse, or
consider even the keyboard port, etc.,

for any outsiders a specified path will be dedicated as
such. Even for the modem to communicate with the outside
world. For the server to compile and run the programs, it
needs one particular port that it maintains during its
service in that system. That port is mentioned manually of
our interest so that those server can run at that specified
port. So that the request and response will be under one
port. The servers will keep observing that port whether any
request has arrived, if so will send the response in the
same port.

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