Robert,
You need to read up on the difference between
classfull and classless networks.
Take the address 100.1.0.0 The classfull mask for this
network is class A which is 255.0.0.0 or /8 . There is
no subnetting yet.
Lets say you want to provide 8 bits of subnetting.
then you have 100.1.0.0 255.255.0.0 or /16 which
contains 8 bits of subnetting.
HTH
Phil.
--- Robert Cabeca <[EMAIL PROTECTED]> wrote: > 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
>
>
____________________________________________________________
Do You Yahoo!?
Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk
or your free @yahoo.ie address at http://mail.yahoo.ie
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
