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Old 10-21-2008, 10:08 AM  
rowan
Too lazy to set a custom title
 
Join Date: Mar 2002
Location: Australia
Posts: 17,393
Quote:
Originally Posted by IhostSEO View Post
10.11.12.13 is an IP which represents 00001010.00001011.00001100.00001101 in binary

The 4 separate decimals are 4 classes of the IP as per classless convention..

So, for IP 10.11.12.13...

10 = A Class
11 = B Class
12 = C Class
13 = D Class
I just re-read this and it makes no sense. It's like you're saying the class is determined by which dotted quad is referenced (?? I can't think of any valid way to describe it)

As per my reply, C classes are all of the 256 IP blocks in the range between 192.0.0.x and 223.255.255.x ... nothing to do with first, second or third dotted quads.

(Of course these days "C class" is often used to refer to a block of 256 IPs anywhere in the IP range, regardless of its real/legacy class...)
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