Consider three hosts interlinked within a local network, possessing private IP addresses: $10\mathrm{.}0\mathrm{.}1\mathrm{.}14,10\mathrm{.}0\mathrm{.}1\mathrm{.}16,$ and $10\mathrm{.}0\mathrm{.}1\mathrm{.}19.$ Separating this local network from the broader internet is a NAT$-$enabled switch$/$router$.$ All IP datagrams, whether outbound or inbound, directed to these hosts are required to traverse this device. Suppose the host assigned IP address $10\mathrm{.}0\mathrm{.}1\mathrm{.}19$ dispatches an IP datagram aimed at the host with IP address $128\mathrm{.}119\mathrm{.}166\mathrm{.}186.$ The originating port is arbitrarily chosen as $3312,$ while the destination port is $80.$