Bob, I would have to agree. With CIDR, in most cases you will get 16 usable subnets and 2 unusable addresses (the network and the broadcast).
ex. 192.168.96.0 255.255.240.0 192.168.96.1 --> 192.168.111.254 all usable 192.168.96.0 network 192.168.111.255 broadcast I could see the question possibly not wanting the zero subnet if you used the following: 192.168.0.0 --> 192.168.15.255 where the 192.168.0.X network might be classified as unusable. This would give you 15 usable subnets... Tim CCIE 9015 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Bob Timmons Sent: Tuesday, July 09, 2002 7:28 AM To: [EMAIL PROTECTED] Subject: Re: Class C summarization question [7:48367] Firstly, 2 to the power of 4 is 16 (2x2x2x2). Secondly, regarding Carl's post, would the answer be 14? I'm not sure the subnet-zero comes into play with CIDR. I was under the impression it was only relevant to subnetting as opposed to summarizing. Does anyone know for sure? > I say 8. 2 to the power of 4 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=48403&t=48367 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]