The answer is in the question. They say an 11 bit SUBNET MASK. So the
natural mask is as you say class B which = 255.255.0.0 hence you then have
an eleven bit SUBNET mask. Which is 255.255.255.224 as you say. Tricky
questions put in there to catch you out.
-----Original Message-----
From: Neil Schneider [mailto:[EMAIL PROTECTED]]
Sent: 10 October 2000 13:18
To: [EMAIL PROTECTED]
Subject: Re: Subnet mask question..
I thought that was strange when I first saw a question like that. Oh Well,
Cisco does things there own way.
Neil Schneider
"Keith Woodworth" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>
> Ive been at this for quite a while and the odd subnet question still gets
> me.
>
> Boson question:
>
> IP address 172.16.3.57 w/ and 11-bit subnet mask. What are valid hosts?
>
> I think ok class B, but I look at 11 bits as 255.224.0.0
> (11111111.11100000.0.0) which does not go with the choices of answers I
> had.
>
> I got it wrong as the answer says an 11-bit mask is 255.255.255.224 when
> using a class b address. Is the mask there not 27 bits? What am I missing
> there? How do they get the above mask w/11 bits?
>
> The valid hosts were:
>
> 172.16.3.33-172.16.3.62, which I think is valid for a 27 bit mask
>
> Thanks for clue.
> Keith
>
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