net directed broadcasts

Fred Baker <> Wed, 28 December 1994 22:52 UTC

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Date: Wed, 28 Dec 1994 14:28:44 -0800
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From: Fred Baker <>
Subject: net directed broadcasts

this is one for rumination:

There is a fair amount of discussion of network-directed and
subnet-directed broadcasts. Since in a classless world the difference
between a network, a subnet, and a supernet is primarily in who assigned
it, I have changed the name uniformly to "network-directed". The concept of
letter bombing was an interesting one in a classful world, and is downright
amusing in a CIDR world.

I am, of course, aware of a few applications that use letter bombs instead
of IP multicast. The best I can do, I think, is indicate that the use of
network-directed broadcasts is a historical approach that some routers
support, and that should be supplanted in time by IP multicasting.

Does anyone have additional thoughts?

    It's hardest to find the real answer when you already know what it is