You need to add a 4) to the list:
The receiver has not implemented the new protocol; the actual sender (where 
the hash is stored) "ages" the hash and purges it after an appropriate 
amount of time.
============================================>8 Clip

1) The apparent sender does not implement the new protocol; keep the message.
2) The actual sender had the requested hash in its table; keep the message.
3) The apparent sender did not have the requested hash in its table; 
discard the message.



-- 
Fred Wright
fawright-at-earthlink-dot-net

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