*>
*> In the first case I describe in this message, I wonder why the lowest
address
*> of class E is not 240.0.0.1 because the adress with all 1 and all 0 have
*> special meanings (all 0 means "this" and all "1" means broadcast).
*>
Because the internal structure and semantics of a class E address are
totally undefined. Maybe the low order bits are NOT a host address,
for example. Note that class D addresses were reserved for many years,
until IP multicast was invented around 1988 and assigned to class D.
Then class E became reserved. If/when we find a use of class E
addresses, presumably class F will become reserved.
Bob Braden
*> Thank you very much,
*> Mai Trang
*>