00:00:01 - Hello.
00:00:02 - My name is Keith Barker.
00:00:03 - And on behalf of the entire CBT
Nuggets family, I'd like
00:00:06 - to welcome you to this course
on IPv4 for subnetting.
00:00:10 - Let's begin.
00:00:11 - Let's start off by verifying
that you and I are in exactly
00:00:15 - the right place at the right
time by answering this
00:00:17 - question together.
00:00:18 - Who was this course
00:00:20 - And in a word, it was
created for you.
00:00:22 - For example, if you are working
with any of these
00:00:25 - vendors right here, Cisco,
Juniper, HP, PaloAlto,
00:00:28 - CheckPoint, or any other major
player with networking gear,
00:00:31 - it is very likely that you're
going to be working and
00:00:34 - dealing with IP addresses and
subnets all of the time.
00:00:38 - A big challenge for people who
are just coming into the world
00:00:41 - of networking and certification
is that they get
00:00:43 - beat up, I mean big time beat
up, by subnetting in those
00:00:47 - entry-level exams.
00:00:48 - Maybe up to 30% or 40% of an
exam is surrounding IP
00:00:52 - addressing and subnetting
of some type.
00:00:55 - So if you are a certification
candidate, especially for the
00:00:58 - entry-level certification
candidates, you absolutely
00:01:01 - want to make sure you
take this course.
00:01:03 - If you're a network penetration
tester, it's very
00:01:06 - important to understand
00:01:08 - For example, if you're a pen
tester and you're doing an
00:01:10 - authorized scan of network
devices, you may want to be
00:01:13 - familiar with how to calculate
subnet ranges so you're
00:01:17 - setting your penetration testing
on the right sections
00:01:20 - or summarizations of networks.
00:01:22 - And what I find a lot is there's
end users who just
00:01:25 - want to know more about how IP
addresses work in general.
00:01:29 - This is a perfect opportunity
for you also to get that
00:01:32 - better understanding.
00:01:33 - Then one of my favorites that's
near and dear to my
00:01:35 - heart is a manager who just
wants to better understand
00:01:39 - what his technicians
are talking about.
00:01:41 - So when the technician is
talking about a slash 28 or a
00:01:44 - slash 25, the manager can have a
really good understanding of
00:01:47 - what that technician
is saying just by
00:01:49 - participating in this course.
00:01:51 - I also am going to add another
one down here, and I'm going
00:01:53 - to put a line there.
00:01:54 - I'm going to get you
fill in that one.
00:01:56 - It could be server
administrators who are working
00:01:58 - with operating systems which
are connected to networks,
00:02:01 - which are usually subnets.
00:02:03 - That would apply.
00:02:04 - And we could probably
make several more.
00:02:05 - I'm going to ask you go ahead
and in your mind fill in that
00:02:08 - last blank.
00:02:09 - Who also would benefit?
00:02:10 - And out of all of these items,
it's very, very likely that
00:02:14 - you, my friend, are the prime
candidate for this course.
00:02:18 - I am super excited to share
the time with you.
00:02:20 - Let me give you a brief tour of
what we're going to cover
00:02:22 - together in this course.
00:02:23 - We're going to start off with
the basics of IPv4, the
00:02:26 - classes, the default masks,
the private IP addresses.
00:02:29 - Taking a look at binary,
00:02:31 - all is said and done--
00:02:32 - I'm going to share with you
a boatload of shortcuts
00:02:34 - that you can use--
00:02:35 - we still absolutely deserve to
understand what's really
00:02:38 - happening in binary behind the
scenes, including the ability
00:02:42 - to convert on demand between
decimal and binary and back.
00:02:46 - The importance of the mask, how
we're stealing host bits
00:02:49 - to carve out custom subnets,
identifying those subnets,
00:02:53 - identifying valid host ranges
on each of those subnets.
00:02:56 - Making sure that you and I have
enough host addressing
00:02:59 - space available on our new
subnets for all the computers
00:03:02 - that need to be there.
00:03:03 - How do reverse engineer
00:03:05 - For example, if we're given an
IP address with a mask, how do
00:03:08 - we take that and then reverse
engineer to determine very
00:03:11 - quickly what the actual subnet
is that that customer is
00:03:15 - connected to?
00:03:16 - The process of summarization
is also huge and very, very
00:03:19 - important, for example, with
network statements or creating
00:03:22 - summary routes.
00:03:23 - We're going to using the
techniques of summarization,
00:03:26 - so we're going to cover that
in this course as well.
00:03:28 - And in a Cisco environment, wild
card masks are also an
00:03:31 - important aspect of working
with summarized or custom
00:03:35 - subnets, because they're needed
inside of access lists
00:03:38 - and network statements if we're
going to configure a
00:03:40 - Cisco IOS router correctly
for custom subnetting.
00:03:44 - In non-octet boundaries, we'll
take a look at how to start
00:03:46 - our custom subnetting somewhere
in the middle, not
00:03:48 - on a clean octet boundary.
00:03:50 - And that's a really important
precursor to doing the job of
00:03:53 - variable length subnet masking,
where together we'll
00:03:56 - walk through, soup to dessert,
the actual carving out of a
00:03:59 - variable length subnet
00:04:01 - And at the end of that video,
if you follow all these with
00:04:04 - me, you'll be able to do
the exact same process.
00:04:07 - The cool thing is as we go
through these videos together
00:04:10 - you'll be gaining these skills
and improving your knowledge
00:04:13 - so that by the time we get to
this last video called the
00:04:16 - final exam you'll have not only
the knowledge of how to
00:04:19 - do something, you'll also
have the measurable
00:04:21 - skills to do it.
00:04:22 - And that translates to taking
those really awesome
00:04:24 - subnetting skills that you're
going to gain and applying
00:04:27 - those to your networks that you
deal with and manage on a
00:04:30 - daily basis.
00:04:31 - That's what gets me so excited
about this course is because
00:04:33 - it's going to make a difference
in your life as you
00:04:36 - work with IP subnets.
00:04:38 - Now I realize that we all come
from different backgrounds and
00:04:41 - we're at different levels.
00:04:43 - So here's what I did for this
course to optimize your time.
00:04:46 - I'd like you take all these
videos in order, so video 1,
00:04:50 - 2, 3, 4, 5, all the way
up to the very end.
00:04:54 - But here's the challenge.
00:04:55 - I know that some of you have
some already pretty great
00:04:58 - subnetting skills.
00:04:59 - So if you're going through video
1 or 2, you may already
00:05:02 - have all the knowledge from
that specific video.
00:05:05 - Here's what I did.
00:05:06 - In every single video,
I've got an Opt Out
00:05:08 - section at the beginning.
00:05:10 - Here's how they work.
00:05:11 - At the beginning of each video,
there's these Opt Out
00:05:14 - questions, and you simply
read through them.
00:05:15 - If you know the correct answers
to those questions,
00:05:18 - you can safely and comfortably
skip that video.
00:05:22 - For example, if we take the Opt
Out for video 2 and video
00:05:25 - 3, we look at video 4, and
when we're looking at the
00:05:27 - questions we don't know
the answers to them.
00:05:29 - We can then jump in right there
and then continue our
00:05:32 - journey all the way to the
end of the course.
00:05:35 - This is also very handy if you
want to go back and review
00:05:38 - this course at some
00:05:40 - By starting the video, looking
at the Opt Out questions, you
00:05:43 - can very quickly assess whether
or not you need to
00:05:45 - revisit the content in that
video, or you can just go
00:05:48 - ahead and answer those questions
and move forward.
00:05:50 - So we're taking absolute
care to optimize your
00:05:53 - time in this course.
00:05:55 - Another question that I'd like
you ask yourself is, how good
00:05:59 - do you want to be with
IPv6 for subnetting?
00:06:02 - Perhaps you just want a
00:06:04 - So you can jump in the series,
and then once we get up to
00:06:07 - variable length subnet masking
and some advanced topics, you
00:06:11 - can go ahead and say,
you know what?
00:06:11 - That's enough for me.
00:06:12 - I've had enough.
00:06:13 - But if you are the type of
person who wants to be in the
00:06:16 - top 10% of people who understand
how IP version 4
00:06:21 - subnetting works, I would
strongly encourage you to take
00:06:24 - this course all the way from the
beginning, go all the way
00:06:26 - to the end, and then review
those pieces where you want to
00:06:29 - make sure you have those
00:06:32 - To that end, also in every
single video I've embedded
00:06:35 - some expert exercises that I
want you to do along with me.
00:06:39 - And as you participate with me
in this course, that process
00:06:42 - of watch, learn, and conquer
will become a reality as you
00:06:46 - master the skills of
00:06:50 - One of the reasons I'm so
passionate and excited about
00:06:53 - this IPv4 something course is
because this is the course I
00:06:57 - wish someone had created for me
about two decades ago when
00:07:01 - I was first learning
00:07:04 - The great news is that this
course is available to you.
00:07:07 - And I'm so excited about
00:07:09 - knowledge with you.
00:07:10 - Your action them right now
is two basic things.
00:07:12 - Number one, I'd like you to grab
a paper and something to
00:07:15 - write with.
00:07:16 - And then I'd like you to click
Next to start the very next
00:07:19 - video as we begin with our
basics of IP version 4.
00:07:23 - I am so excited about beginning
this journey with
00:07:26 - you right now.
00:07:26 - I hope this has been informative
for you, and I'd
00:07:29 - like to thank you for viewing.