checksum error

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why the ip, tcp, udp all discards checksum error whith out notifying
the sender

Re: checksum error wrote:

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Can't you formulate a proper question?

As for what you might have asked:

a) Normal TCP/IP stacks do verify the checksums, and if a mismatch occurs
the packet is dropped and the sender is notified with an
b) some high-performance implementation may decide to not verify the
checksums under big load

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