From: Anthony Sequeira (asequeira@internetworkexpert.com)
Date: Sat Jan 17 2009 - 07:40:35 ARST
Yeah - you certainly got the gist - just be sure to provide some
insight into why that move is beneficial....
"IP Precedence marking only featured the use of three bits in the ToS
byte. This limited us to a total of 8 marking options for traffic.
Since Cisco asked us not to use two of these marking options, we were
restricted to 6 marking options. This is not enough marking options
for our complex networks of today that potentially carry voice, video,
transactional, and many other forms of data traffic. The move to a
fuller utilization of the bits in the ToS byte allows for more
classification options, and the ability to indicate drop priority..."
At this point the proctor is going to say - ENOUGH - NEXT QUESTION.
By the way - I am now rooted in the Southeast of the United States -
so if the question is to be delivered orally back to the proctor -
here is what I say...
"IP Precedence marking only filled up the first three bits of that
there ToS byte. Hellfire! I only got 8 gosh darn marking options! You
sons of a bitches took two of those away and now I only got 6..."
I hope you get the idea.
P.S. This is my most politically incorrect post in my Group Study
history.
:-)
Anthony J. Sequeira, CCIE #15626, CCSI #23251
Senior CCIE Instructor
asequeira@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Outside US: 775-826-4344
On Jan 16, 2009, at 10:26 PM, TCP IP4 wrote:
> First come out is 3 bits vs 6 bits. Do I need to drill more?
>
> On Fri, Jan 16, 2009 at 7:20 PM, Anthony Sequeira
> <asequeira@internetworkexpert.com> wrote:
>> Here is another sample open-ended question for you in the area of
>> QoS...if
>> you find this tough - then yes - you need to study more QoS. :-)
>> IMHO of
>> course.
>>
>> What are the advantages presented by DSCP markings when compared to
>> the
>> legacy IP Precedence approach?
>>
>> Anthony J. Sequeira, CCIE #15626, CCSI #23251
>> Senior CCIE Instructor
>>
>> asequeira@internetworkexpert.com
>>
>> Internetwork Expert, Inc.
>> http://www.InternetworkExpert.com
>> Toll Free: 877-224-8987
>> Outside US: 775-826-4344
>>
>> On Jan 16, 2009, at 10:03 PM, TCP IP4 wrote:
>>
>>> Regarding the interview quiz announcement how should I interpret
>>> "well
>>> prepared"? Everyone has some weak areas for the lab, otherwise we
>>> all pass the test. I've been working on the practice labs for a
>>> year
>>> using a popular vendor materials. But I am still not good at QoS
>>> area due to lack of practical use of them. Should I go back do more
>>> QoS reading for the sake of ad-hoc quiz? I don't think wasting
>>> $1400
>>> for 5 minutes of time is a good investment.
>>>
>>> -Tom
>>>
>>>
>>> Blogs and organic groups at http://www.ccie.net
>>>
>>> _______________________________________________________________________
>>> Subscription information may be found at:
>>> http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
Blogs and organic groups at http://www.ccie.net
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