Anselm Lingnau wrote:
> Alessandro Selli wrote:
>
>> My vote is in favour of CIDR and VLSM notation, and against mention of
>> A, B and C network classes.
> I think it's a complete no-brainer that the principles of CIDR should be part
> of the exam.
Several things are "a complete no-brainer", but there ought to be a
limit to the amount of stuff we put in the objectives.
> I don't think »VLSM notation« is even a thing.
Of course it *is* a convention. But I am willing to give it up
leaving mention of CIDR only, if that can contribute to the cause of
world peace.
> Our training materials mention the archaic network classes,
I do too, generally in these terms: «You might come across old docs
that refer to address classes. They are a pre-CIDR classification of
IPv4 public addresses that use fixed 8, 16 and 24 bit network masks.»
That's all, because I know they are not going to run into questions
concerning these address classes when they will take the LPIC-1 exams.
> mostly because (a) they don't exactly take long to explain,
Of course I agree, but I'd rather spend 30 extra seconds explaining
or producing examples of concepts they might be asked to prove they are
acquainted with than spend them on things that are just short to expound.
> and (b) people may come across them
> in some places,
When I train people to LPI certification objectives I train them to
pass LPIC-1 certification exams, not to be good, all-round GNU/Linux
sysadmins. I do recognize the value of knowing more compared to less,
but time is always a strong constraint in the classes I hold. I do make
clear there are many more things in the digital world they will need to
know to be good professionals than I can cover in a one-week intensive
course (this is what I am asked to deliver 98% of the times), but I also
make clear that I will not devote any time to anything that they can be
sure they will not be asked when they will take LPIC-related exams.
I know the widest possible knowledge and culture is good, but we
just cannot afford it in the always too little time firms are willing to
devote to their employee's technical training and professional
certification. Consider this: you must know Milan is the heart of the
Italian industrial and financial world. Well, I was asked to hold a
course there for a professional who needs to train for the two LPIC-2
exams, skipping LPIC-1 because the involved person feels he knows enough
about it to pass, except that should the need rise I am going to briefly
cover LPIC-1 related items on the fly. Guess how long a time we are
allotted to do this all? I would tell the guy "Listen, I don't know how
much you already know and how quickly you learn things, but this sounds
a little crazy" but I cannot. As an employee I must do as
Administration tells me to do, and they already accepted those terms.
And must prepare documentation for a one-week super condensed,
full-time, immensely intensive training, which I *hate* to do. But,
again, this is the rule in this part of the world. Thirty seconds saved
from not having to go through legacy technology that is not part of the
objectives drive me overjoyed!
> e.g., the way ifconfig assigns default network masks.
ifconfig is way beyond retirement date, like everything that belongs
to the legacy net-tools package. I know they are still in the
objectives, but I do cover just the essentials. To me it does not make
more sense to cover exhaustively A, B and C address classes and
net-tools than it makes covering nslookup and /etc/host.conf. Know they
exist. Enough. If you are still curious to know more about them, you
already learned how you can access the local documentation about
commands and file formats.
> I'll keep that content in the book no matter what the exam objectives say.
This is your decision.
>> I understand that IANA assignes IPv4 blocks as classes and the way in
>> -arpa
>> .add
>> r zones work, but this is knowledge of sysadmin level, not of LPIC-1
>> (plain user) level.
> Also, RFC 2317.
Is Classless IN-ADDR.ARPA delegation part of the LPIC-1 objectives?
Or is it one more thing you include in your classes and textbooks
regardless?
With kind regards,
--
Alessandro Sellihttp://alessandro.route-add.net
VOIP SIP:[email protected]
Chiavi PGP/GPG keys: B7FD89FD, 4A904FD9
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