Andreas Bartelt <[EMAIL PROTECTED]> wrote: > I was wondering why such a simple checksum algorithm is implemented in > TCP. I suppose, it's because of the slow CPU performance many years ago. > This algorithm looks so unreliable to me that it even can't protect > against some pretty simple errors, which (I suppose) also could occur
The idea is to protect against lost, duplicated, or reordered packets. If the underlying medium suffers from bit errors, the link layer should handle those. For example, Ethernet frames include a 32-bit CRC, which makes it possible to recognize and discard corrupted packets. -- Christian "naddy" Weisgerber [EMAIL PROTECTED]
