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Some of the fields in packet headers are byte order sensitive; the data must be sent in high-to-low order. ``Byte order'' illustrates this.
Byte order
You must account for this byte order when writing an
application that communicates with an unknown machine type.
For example,
if an application running on an Intel® 80386
CPU does a t_sndudata,
the data portion of the IPX packet is sent
over the wire in 80386 (low-to-high) order.
This presents a problem if the receiving CPU
(for example, a Motorola® 68030) does not use the same
low-to-high byte order.