Reliable UDP

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The main reason people would choose UDP/RUDP over TCP is because of how TCP handles out of order packets. You may only care about the most recently received packet and want that as soon as it arrives. In TCP, if your most recently received packet is not the next one in sequence, TCP will not deliver it to you until everything else has been received.

If you need to guarantee sequence and delivery then just use TCP. If you need to guarantee sequence and delivery plus get the most recent packets as soon as they arrive, then use RUDP.

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