Hi, It's way too late here for me to start a full tutorial, but Michel is right. There is a few errors in the previous post (and a technical one in his , an IP got a .168 that isn't supposed to be there.).
I would suggest that anyone that read those messages as a base for their understanding of the theory go review the CIDR annotation specification (google is your friend, wikipedia too). I would suggest a very close look at the difference between the CIDR, the host bit and the netmask. Another good page to be read is the one under the name "subnetwork" on english wikipedia. Those are a very good primer if you intend to go from home network to true business network with BGP implementation (then read Autonomous system number specification). After if it is still a big mystery, send me an email, i'll try to explain it better, but... until then, be very critic of what you read in thoses last posts. P. -- Pascal Charest, skype: pascal.charest Free software consultant @ Laboratoire Phoenix http://www.labsphoenix.com On Mon, Nov 23, 2009 at 7:46 PM, Michel Di Croci <[email protected]>wrote: > *So an addresslike **192.168.1.0/8* <http://192.168.1.0/8>* represents the > addresses from 192.168.1.1 through > **192.168.1.255. * > > > I'm not sure that's correct. It would really mean that the first 8 bits of > the IP (the first segment) is full 1. So that the sub network portion of the > adress would be: 192.X.Y.Z. So it would vary from 192.0.0.0 to > 192.168.255.255.254. > > Michel > > On Sun, Nov 22, 2009 at 9:30 AM, Leslie Satenstein > <[email protected]>wrote: > >> I appreciate the answer you provided and the link. Thank you. >> >> I searched for it on google, etc. for the /x comment but did not find the >> explanation. >> >> I had thought of the answer similar to what you indicated, but I thought >> it was consecutive addresses, not the bitmap type of control. >> >> *------------------ >> >> * >> >> Regards >> * >> Mr. Leslie >> * >> *Leslie Satenstein >> * >> >> mailto:[email protected] <[email protected]> >> mailto [email protected] >> www.itbms.biz >> >> >> --- On *Sun, 11/22/09, Dan Coutu <[email protected]>* wrote: >> >> >> From: Dan Coutu <[email protected]> >> Subject: Re: [MLUG] My little 2 cents [INITIATIVE] >> To: "Montreal Linux Users Group" <[email protected]> >> Date: Sunday, November 22, 2009, 8:14 AM >> >> Leslie, an IP address that is followed by a slash and a number is a CIDR >> address. It can refer to an entire block of IP addresses. The number >> following the IP address is the size of the bitmask. In your example it >> would be 8 bits. >> >> IP V4 addresses (which is what most of us are familiar with) are 32 bit >> addresses that are typically represented as four numbers separated by >> dots. Each dotted number represents 8 bits of the address. So an address >> like 192.168.1.0/8 represents the addresses from 192.168.1.1 through >> 192.168.1.255. 192.168.0.0/16 would be the larger block of addresses >> from 192.168.0.1 through 192.168.255.255. >> >> I hope this helps to illustrate the pattern. You can get more detail on >> the wikipedia. >> >> http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing >> >> Dan >> >> Leslie Satenstein wrote: >> > Implementing this idea would have to be a hobby activity. But, as a >> > junior in linux experience, I would love a "coaches corner" where I >> > could ask newbie or stupid questions. >> > >> > For example can someone explain what the slash 8 is in the case >> > where there is an assignment to localhost as in 127.0.0.1/8 >> > >> > I know what it means when we would do localhost:portno but what >> > about localhost/8 and can you have both portno and slash8 on the same >> > line. >> > >> > *------------------ >> > >> > * >> > >> > Regards >> > >> > * >> > Mr. Leslie >> > * >> > *Leslie Satenstein >> > * >> > >> > mailto:[email protected]<http://mc/[email protected]> >> > mailto [email protected] <http://mc/[email protected]> >> > www.itbms.biz >> > >> > >> > --- On *Wed, 11/18/09, Valery Shaevitch >> > /<[email protected]<http://mc/[email protected]>>/* >> wrote: >> > >> > >> > From: Valery Shaevitch >> > <[email protected]<http://mc/[email protected]> >> > >> > Subject: [MLUG] My little 2 cents [INITIATIVE] >> > To: "Group" >> > <[email protected]<http://mc/[email protected]> >> > >> > Date: Wednesday, November 18, 2009, 1:26 AM >> > >> > >> > Hello, my felow mlugers, >> > >> > I am here about 6 years already [well, was not very active thouhg] >> > Well, I was looking through many different problems, solutions, >> > programming so on ... and distributions >> > >> > And I think why wouldn't we get some other, our distribution, that >> > would >> > not only fit our needs, but also promote Canada and Montreal as a >> > great >> > technology place... We are great country, but still fighting with >> > these >> > elephant businesses as Bell, Rogers, Microsoft ... so you name it, >> you >> > know >> > >> > These are my 2 cents to start it >> > >> > Any thoughts ? >> > >> > Valery >> > >> > _______________________________________________ >> > mlug mailing list >> > [email protected] >> > <http://mc/[email protected]></mc/compose?to= >> [email protected] <http://mc/[email protected]>> >> > >> https://listes.koumbit.net/cgi-bin/mailman/listinfo/mlug-listserv.mlug.ca >> > >> > ------------------------------------------------------------------------ >> > >> > _______________________________________________ >> > mlug mailing list >> > [email protected] <http://mc/[email protected]> >> > >> https://listes.koumbit.net/cgi-bin/mailman/listinfo/mlug-listserv.mlug.ca >> > >> >> _______________________________________________ >> mlug mailing list >> [email protected] <http://mc/[email protected]> >> https://listes.koumbit.net/cgi-bin/mailman/listinfo/mlug-listserv.mlug.ca >> >> >> _______________________________________________ >> mlug mailing list >> [email protected] >> https://listes.koumbit.net/cgi-bin/mailman/listinfo/mlug-listserv.mlug.ca >> >> > > _______________________________________________ > mlug mailing list > [email protected] > https://listes.koumbit.net/cgi-bin/mailman/listinfo/mlug-listserv.mlug.ca > >
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