On Thu, Jan 8, 2009 at 12:13 PM, Robert Paulsen
On Thursday 08 January 2009 10:47 am, Greg Freemyer
I think some brokerage firms broadcast out various news shows to the
traders desktops via IP broadcast mechanisms. I assume they use Class
D packets to carry the UDP packets.
What is the advantage of this over what I think the general approach is of
using all one-bits in the rightmost part of the address not covered by the
subnet mask? e.g. (192.168.0.255)
2 things I can think of:
1) That only broadcasts across a single lan segment. Big enterprises
might want to do multi-cast to multiple segments at once. Think of
those brokers sitting in a tall building with one lan segment per
2) That gives you one broadcast address only and thus only one way of
controlling how it gets forwarded at the network.
I think routers / switches can be configured to forward specific Class
D addresses and not others.
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