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The diagram in your question does not show any use of NAT, so it's not too good a choice. If we assume that R2 is using source NAT/NAPT, and R7 is using destination NAT aka port forwarding, then Alice addresses the packet to Bob's public router R7. Bob's private address is unknown to Alice and useless. R2 substitutes (one of) its public IP address for Alice'...


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It is difficult to understand from the photo the type of NAT or PAT that is occurring in the scenario. Which makes it difficult to answer your question exactly. There are four types of translations: Static NAT, Static PAT, Dynamic PAT, Dynamic NAT. Of those four, Dynamic PAT is uni-directional. Meaning connections will only flow through the translation ...


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