Question: Considering the IP/TCP protocol stack, IPv4 packets header contains a checksum field that calculated over the IPv4 header. Routers along the path from source to

Considering the IP/TCP protocol stack, IPv4 packets header contains a checksum field that calculated over the IPv4 header. Routers along the path from source to destination check this header and discard the packet if an error is detected without any attempt to notify the source. Explain how TCP is able to run over this unreliable best-effort IPv4 and provide reliable connection-oriented service
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