What is a message boundary?

Question

What is \"message bonudaries\" in the following context?

One difference between TCP and UDP is that UDP preserves message boundarie

Answer 1

Message boundaries in this context is simply the start & end of the message/packet. With TCP connections, all messages/packets are combined into a continuous stream of data, whereas with UDP the messages are given to you in their original form. They will have an exact size in bytes.