Both UDP and TCP use port numbers to identify the destination e... | Filo

Both UDP and TCP use port numbers to identify the destination entity when delivering a message. Give at least one reason for why these protocols invented a new abstract ID (port number), instead of using process IDs, which already existed when these protocols are designed.

TCP vs. UDP — What's the Difference and Which Protocol is Faster?

Difference Between TCP and UDP (with Comparison Chart) - Tech Differences