On Thu, Jan 13, 2000 at 11:25:47AM +0530, Ajay Agrawal wrote:
> Hi,
> I observer that when the linux IP, fragments the packet, it sends the first
> fragment packet (containing the Transport layer information) at the last. In
> short if the packets arrive in the transmitted order at the destination the
> last fragment is received first and the first fragment at the last.
> Why is it so?
because it allows us to calculate the checksum while the fragments are
being sent, then store it in the first fragment, which is sent last.
It's a cunning little optimisation.
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