sockets - Does UDP allow repacketization?

Question

I know that for TCP you can have for example Nagle's Algorithm enabled. However, can you have something similar for UDP?

Practical Question(assume UDP socket):

If I call send() two times in a short period of time with 1 byte of data in each send() call. Is it possible that the transport layer decides to send only 1 UPD packet with the 1 byte + 1 byte = 2 bytes of data?

Thanks in advance!

Answer 1

No. UDP datagrams are delivered intact exactly as sent, or not at all.