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Sure, but you mentioned protocols that have "built overlays with layer 3 function on top of UDP". What are the examples you're referring to? EDIT: My comment i
by azernik 7y ago
Sure, but you mentioned protocols that have "built overlays with layer 3 function on top of UDP". What are the examples you're referring to?
EDIT: My comment in reply to the sibling comment, which mentioned vxlan:
That's more of a recursive version of the lower layers; using layers 1-4 of one instance of the OSI model as layer 2 of another instance. If anything, this demonstrates just how useful the clear abstraction barrier between layer 2 and layer 3 is; you can have a very complicated software package (like a VPN) as a layer 2 instead of a physical network and all the code from layer 3 up doesn't even need to know.