In the days of classless routing, who cares? ;) Goooooooooo CIDR!
:P Chris -----Original Message----- From: Christopher A. Congdon [mailto:[EMAIL PROTECTED] Sent: Friday, February 25, 2005 8:03 AM To: [email protected] Subject: RE: [gb-users] Slow website customer complaints > >resolve the problem is to try and access their website, I also have them > >perform a trace route. And now, I have found a company near us that has > >an ip address very close to ours. (within the same class D network and > >pinging them turned around a quick response). So, I thought if I had > our > > A Class D network? Do you mean class C? > *Technically* Class C ranges from 192.0.0.0 and only goes to 223.255.255.255. Again, *technically* anything 224.0.0.0 - 239.255.255.255 is a Class D address. Remember that 'class' actually is supposed to indicate which of the left most bits in an IP address signify the network. In a Class C, 110 of the first octet indicate the network range, while a Class D is 1110. Nowadays, the terms Class A, B, C have really been corrupted. To most people nowadays, a Class C just means a network range of 255 IP addresses. This table from http://compnetworking.about.com/od/workingwithipaddresses/l/aa042400b.ht m Explains it: Class Leftmost bits Start address Finish address A 0xxx 0.0.0.0 127.255.255.255 B 10xx 128.0.0.0 191.255.255.255 C 110x 192.0.0.0 223.255.255.255 D 1110 224.0.0.0 239.255.255.255 E 1111 240.0.0.0 255.255.255.255 When I first started learning TCP/IP, ARIN wasn't handing out anything 224+, so Class D and C were theoretical. Christopher Congdon Network Engineer Congdon Web LLC http://www.congdonweb.com ------------------------------------------------------ To unsubscribe: [EMAIL PROTECTED] For additional commands: [EMAIL PROTECTED] Archive: http://archives.gnatbox.com/gb-users/ __________ NOD32 1.1007 (20050223) Information __________ This message was checked by NOD32 antivirus system. http://www.nod32.com ------------------------------------------------------ To unsubscribe: [EMAIL PROTECTED] For additional commands: [EMAIL PROTECTED] Archive: http://archives.gnatbox.com/gb-users/
