I dont understand why the answer "C) Routing protocols must carry the
prefix length with the 32bit address" doesn't apply to the question of "When
you develop a subent routing scheme, to which guideline must you adhere?"
When you develop any subnet routing scheme, you must use a classless routing
protocol that can factor in the subnet with the network address.
Summarization is similar, but the answer seems right to me.
Could anyone explain why the question is wrong?
Thanks,
Fred
>From: Priscilla Oppenheimer <[EMAIL PROTECTED]>
>Reply-To: Priscilla Oppenheimer <[EMAIL PROTECTED]>
>To: Hunt Lee <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
>Subject: Re: subnet routing scheme question
>Date: Wed, 31 Jan 2001 16:56:24 -0800
>
>Hee, hee. This is very funny. As soon as I saw it I said too myself, "this
>looks really familiar." These are bullet points in my book, Top-Down
>Network Design. The bullets are in the CID class also and are based on
>concepts that Howard Berkowitz and Peter Welcher taught me. They might be
>in BSCN also because Howard had a big influence on that class also.
>
>However, some clueless person screwed it up! This must be from a COLT test.
>&:-)
>
>At 07:50 AM 2/1/01, Hunt Lee wrote:
> >I have got the following question, but I don't understand the answer...
> >
> >When you develop a subent routing scheme, to which guideline must you
> >adhere?
>
>The question is supposed to be "When you develop a route summarization
>scheme..."
>
>
> >A) IP addresses must share the same right-most bits.
>
>They changed left-most to right-most to make this a wrong answer. If IP
>addresses share left-most bits, then they can be summarized.
>
>
> >B) Routers must base routing decisions on a 16bit or 32bit address
>
>They added 16-bit to make this a wrong answer. It would be right if it
>simply said "must base routing decisions on a 32-bit address."
>
>
> >C) Routing protocols must carry the prefix length with the 32bit
> >address
>
>This one is true (because the question is supposed to be about
>summarization).
>
>
> >D) Routers must base routing decisions on a prefix length that is 16bit
> >or 32bit long.
>
>They added 16-bit to make this wrong. Routing must be based on a 32-bit
>prefix in case there are host-specific routes. In other words, the router
>must look at all 32 bits.
>
>
> >I thought the answer is C, but the answer is B. Any help would be
> >greatly appreciated.
>
>
>Priscilla
>
>
> >Regards,
> >Hunt Lee
> >IP Solution Analyst
> >Cable and Wireless (Sydney)
> >
> >_________________________________
> >FAQ, list archives, and subscription info:
> >http://www.groupstudy.com/list/cisco.html
> >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>
>
>________________________
>
>Priscilla Oppenheimer
>http://www.priscilla.com
>
>_________________________________
>FAQ, list archives, and subscription info:
>http://www.groupstudy.com/list/cisco.html
>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
