Sir , i have a question . i cant understand that what is the different between source ip and destination ip...?

Hi,

Source ip :- IP address of the device which is generating the data/packet/request .

Destination ip :- IP address of the device to whom you want to send data/packet/request.
 

For example: - If you want to access your facebook feed. You will send a request to facebook page. In this case, source ip will be ip address of your device and destination will be facebook server IP .

Hope it helps!