Re: Rose Tea

Debbie Deutsch <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> crymad <[EMAIL PROTECTED]> wrote in
> news:[EMAIL PROTECTED]: 
> 
> > 
> > 
> > So the first two octets designate the actual ISP?  I would have
> > thought the last two do, with the first two designating a broader,
> > geographic region.  Much like, say, the way country codes and area
> > codes are for telephone numbers.  With IP addresses, it's the other
> > way around? 
> > 
> > --crymad
> > 
> 
> No, actually it's not that simple... or simple at all.
> 
> IP addresses are divided into two parts.  The first part identifies a 
> network.  The second part identifies a host system (like a PC or a server 
> or a switch interface) inside the network.  It has nothing to do with 
> geography.  It's just a way for the people who run a network to obtain a 
> number for their network, and for them to assign numbers to things 
> attached to the network.
> 
> It used to be there were some rules for how big the first part of the 
> address was (which dictated how much was left for the second part).  But 
> the Internet grew to be much bigger than its designers ever expected.  It 
> began to run out of usable addresses, because the rules worked in such a 
> way that there just were not enough addresses that could be used for very 
> large networks.  So some new, backwards-compatible rules were created to 
> get around that.  I would probably bore most folks on this list if I 
> tried to explain here.  The long and the short of it is that how an 
> address is interpretted is by matching against a table.  You can't just 
> look at an address in isolation and tell.  Also, the first part of an 
> address (the part that identifies a network) doesn't have to be an even 
> number of octets long.  You really have to compare the binary numbers.  
> However, if you do see two addresses that match up past the first octet, 
> it is reasonable to wonder if they belong to the same network.
> 
> Oh, and just to make things more interesting, an ISP can own multiple 
> networks (of course).  So, if two addresses start the same way, they 
> might belong to the same ISP, but if two addresses look completely 
> different, they might belong to the same ISP anyway.
> 
> It is best, of course, to drink a cup of tea while contemplating these 
> mysteries.  :-)
> 
> Debbie

Debbie & Crymad:

Thanks guys for your explanation but the problem is I have been lost
in space. Sorry, I don't understant this kind of IT language that
much. I think we can close down this issue. if I have any problem I
will personally contact you. Reminds me some another Topic where
everything became little indecent at the end , though the topic was a
simple quistion.  I withdrawl my question. Lets have a good cup of tea
and relax. Thanks again.

Ripon
(From Bangladesh)