Suppose we eliminate tcp and instead rely exclusively on udp as our only transport layer protocol. ⢠how does this impact operations at the application layer? ⢠how does this impact operations at the network layer?

TCP is a reliable protocol. Verification of the data (to an extent) is performed. UDP is an unreliable protocol. It's a "fire and forget" protocol. Since the verification (packet counts, checksums) isn't being done, the application[s] have to do it.