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Shareware Overload Trio 2
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Shareware Overload Trio Volume 2 (Chestnut CD-ROM).ISO
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HUBIP.INF
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1993-12-13
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HUB IP ADDRESS
~~~~~~~~~~~~~~
The HUB IP address should have been given to you when
you were issued with your own IP address. However, it
may have been overlooked. Don't panic! If you have a
HUB in your area that has existed for any length of
time, NOSINST will attempt to calculate the right HUB
address for you.
HUBs usually occupy the first address in any block of
16. However, this is not a universal rule. Some
areas have much larger blocks allocated to each HUB,
in which case this program will not be able to help
you. You will have to ask local stations for the
information.
Why do HUBs occupy the first address in a block?
The short and simple answer is; to simplify mail and
live link routing. For instance, take a user with an
address of 44.131.19.165. Take the last number (165)
and divide it by 16, (10 remainder 5), throw away the
remainder, (10), then multiply the result by 16,
(160), you now have the most likely address for a HUB
that routes mail for that station. Now, all this maths
is just to show you that one could route mail to a HUB
by saying "send anything with an address in the range
44.131.19.160 to 44.131.19.175 to the HUB with the
address 44.131.19.160". In fact, "masking" off IP
addresses is very simple in real terms and is just one
mathematical operation (IPaddress AND 0xfffffff0 for
those that understand computer maths).
The end result of the above calculation is a block of
addresses under the "wing" of a HUB station.
It should be clear how vital it is to get the correct
information and also how difficult the explanation can
sound even though it's easy! hi.