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For questions about network routers, devices that forward data packets between computer networks, commonly at the network layer (layer 3) of the OSI model.

6 votes
2 answers
2k views

Must the checksum field of the IPv4 header always be updated?

When an IPv4 datagram comes to a router for forwarding, does it always update the value of the header checksum field? …
dulaj sanjaya's user avatar