Re: IP Subnetting Question

[michael champion]

You must have been using that god-awful CiscoPress ACRC book. You are absolutely correct, and the book is absolutely wrong. The sad part is that these kind of mistakes are rampant in CiscoPress books, and they make you begin to doubt whether you understand the concept. It is simple. /n is the number of contiguous 1 bits in the subnet mask, period.   Regards, MLC "Robert Cabeca" <[EMAIL PROTECTED]> wrote in message 008001c0385b$a973eca0$[EMAIL PROTECTED]">news:008001c0385b$a973eca0$[EMAIL PROTECTED]... I am not understanding the concept of using an IP address followed by /n. Example 10.20.193.20 /28. The way I am looking at it I get a Subnet mask of 255.255.255.240. But I am being told that it is really a mask of 255.255.240.0, however I am not being given an explanation. I thought that 255.255.240.0 has a /20. but it is a /12 instead? Any enlightenment would be appreciated.   peace Rob