The 172.16.0.1 - 172.16.0.255 is a Class B IP range. The range that you are specifying is still in the Class B subnet range, but it is similar to a Class C because you are getting 254 effective IP addresses like you would if you had a Class C range. Hence the 255.255.255.0 or /24 to which Nate is referring.
Here are the "standard" subnet masks for IP ranges: Class A - 255.0.0.0 Class B - 255.255.0.0 Class C - 255.255.255.0 The above masks actually do not subnet the IP range. If you use the "standard" masks, then you would actually not be subnetting and, for example, 24.0.0.0-24.255.255.255 would be your full Class A IP range (minus your network and broadcast IP's). Even though a 255.255.255.0 or /24 subnet mask is usually associated with a Class C IP range, one can still have such a mask with a Class A and Class B IP ranges. You are sub-dividing a full Class A or Class B network into subsections or subnets. That's why they call it a 'subnet' mask. :) I hope this helps. Andy. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Sunday, November 17, 2002 9:26 AM To: [EMAIL PROTECTED] Subject: Re: Subnet-mask of IP address 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 Right ? But you see the message come from "Nate" > On Sun, 2002-11-17 at 04:26, [EMAIL PROTECTED] wrote: > > nate wrote: > > > > > > Hello, > > > > > > > > What is the subnet-mask of IP "172.16.0.1" - "172.16.0.253" ? > > > > How to calculate ? > > > > > > that would be a class C - /24 or 255.255.255.0 So, I want to know is it Class B subnet or Class C subnet ? Who can help me about IP address range and Subnet mask ? eg : Class A IP range 10.x.x.x Class B IP range 172.16.x.x-172.31.x.x Calss C IP range 192.168.x.x What is the subnet-mask about Class A, Class B ans Class C ? Thank for your help ! Edward. -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED]?subject=unsubscribe https://listman.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED]?subject=unsubscribe https://listman.redhat.com/mailman/listinfo/redhat-list
