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My name is Marcus Ogren, and I read you tutorial about TCP and UDP protcols from my home in Stockholm, Sweden.
I recently ran this application called TPTest. The program runs series of tests, first up/down traffic with TCP, and then up/down traffic with UDP. The test results where: 80 kb/s up with TCP and 600 kb/s with UDP. So I read the article you wrote and so I had the questions answered regarding why UDP was so fast. So here is my new question:
can I use UDP in the same way I use TCP? For example:
Can I send a packet from point A with IP address X.X.0.1 to point B with IP address X.X.0.2 with UDP when I know where it is supposed to drop down?
Hope you will get this message, it would solve several things for me, and help me understanding more of the internet.
Thank you on behalf
I might not hear this answer, so if please could just paste it into the original mail, and mail it to me later. That would be great! Thank you again.
Yes you can absolutely send UDP packets from one ip address to another. There is just no guarantee that it will get there. The major difference between TCP and UDP packets are that TCP packets are guaranteed to get to the location you specify otherwise a error will be generated. UDP on the other hand will do its best to get to the location you requested, but there is no guarantee, and no way of determining it it.
Usually the TCP side of tings uses more bandwidth compared to the DNS side, but it is not impossible for the reverse to be true. If you were constantly sending more UDP packets I would look further into what is running on your machine.