Following along with boot.dev's & Primeagen's course but in Python:
Why does HTTP/1.1 uses TCP as transport layer protocol? TCP is reliable, in-order packets
User Datagram Protocol (UDP) is often compared to TCP, as they are both transport layer protocols. Here are the high-level differences between the two:
| TCP | UDP | |
|---|---|---|
| Connection | Yes | No |
| Handshake | Yes | No |
| In Order | Yes | No |
| Blazingly Fast | No | Yes |
TCP establishes a connection between sender and receiver with a handshake, and ensures that all the data is sent in order. UDP yeets the data to the receiver and hopes they can make sense of it.