-----Original Message----- From: Mareline Sheldon [mailto:[EMAIL PROTECTED]]
Hi, I have a doubt on the utility of the private IP address range 172.16/16 to 172.31/16, 192.168.0/24 to 192.168.255/16 etc. >> There is no doubt to have : they are private ranges, for private use. It means, you >don't have to ask/warn anybody to use them in your private network. You can build >your own private network with no direct connection to the public Internet (i.e. not >being part of the Internet), and freely use those private ranges (one range per class >- A, B, C). AFAIK, these IP addresses are given to the sys admins to assign inside their AS and these must be not advertised to the world outside. For communication with the outside world we must use some well defined unique IP address. Is that so? >> Those addresses are simply not used/recognized/routed on the public Internet. You >can do anything inside your private network, but not use them for any public >interface. If you want your network to be connected to the Internet, you need at >least a router or a network address translator between your private network and the >public Internet. This leads to a doubt .. If i have a switch with say, two routers in it having private IP addresses assigned as 172.31.1.1 and 172.31.1.2. I can then not have these IP addresses outside in my network. Right? >> Where is the problem? Any router has at least 2 interfaces. In this case, you have >one interface connected to your private network and using one private address, and >one other interface connected to the public Internet and using one public/official >address. That's one of the purposes of a router, by the way. regards, mareline s. >> If you need more information, any additional detail, we can exchange mails >privately to avoid flooding this mail list with those basic topics. Don't hesitate.
