Michael Schwendt wrote:
> On 17 Nov 2002 07:44:38 -0500, Doug Potter wrote: > > > Actually that is a class B address. > > > > The first octet of a class A is 1-126 (127 reserved for loop back) > > class B is 128-191 > > class C is 192-223 > > > > since 172 is between the ranges of 128-191 that would make it class B > > > > Class B subnet 255.255.0.0 or /16 The original poster, however, asked what 172.16.0.1 to 172.16.0.253 would be. That in itself is a /24 CIDR block (or class C block if you're thinking pre-CIDR). While the block resides within a RFC1918 Class B reserved private IP block, he's only using a Class C sized portion of it on his network which is perfectly acceptable. Then again, it's growing more apparent that many networks are moving towards classless addressing, and the original poster's question is evidence of that. > > The step from Class B to /16 is beyond me. If memory serves > correctly, the Class B subnet in RFC1918 is 172.16.0.0/12 > which would be netmask 255.240.0.0. Most documentation I've found states that a 255.255.0.0 or /16 is the size of a class B block. RFC1918 states that the 172.16.0.0/12 "block is a set of 16 contiguous class B network numbers". Hope this clarifies. -Rick -- Rick Johnson, RHCE - [EMAIL PROTECTED] Linux/WAN Administrator - Medata, Inc. (from home) PGP Key: https://mail.medata.com/pgp/rjohnson.asc -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED]?subject=unsubscribe https://listman.redhat.com/mailman/listinfo/redhat-list
