The answer is YES. The unique "key" of the connected socket is called… — andreyka26_se

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The answer is YES.
The unique "key" of the connected socket is called 5-tuple:
source_ip; source_port; destination_ip; destination_port; protocol

Under the hood, kernel stores TCP sockets and UDP sockets in different tables -> that's why they can live together, and kernel will dispatch them based on protocol on the packet

#network #kernel

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