this post was submitted on 21 Jul 2023
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This is a really good way of explaining the difference.
So, UDP just sends it out there and anyone can intercept it?
No. UDP is at the packet level. Interception is a different layer.
To use to today's language, UDP yeets the packets at you as fast as it can generate them.
It doesn't care if you catch any of them.
Don't yeet the baby.
What do you mean interception is at a different layer? You can capture at any layer as long as the payload isn't encrypted, and if it is, you still get layers 1 through 4 (Physical, Link, Network, and Transport).
UDP is a transport protocol. OSI layer 4. It sits atop the packet (network/L3) layer which is where IP dictates where a packet is going. A broadcast or multicast IP address would mean it can be observed by many machines, but unicast is still the most common, and is routed to just one machine.