Wallow I once again told your private IP addresses what in the world is that you should or are these
or leaders are only used for internal purposes don't use them with in the company.
They took the chunk out of the class a class B to class C they said OK you're going to take this chunk
of addresses and use it internally she could not work inside you know you go around and do everything
you need to do in general.
Oh cool.
I get really half on the first A B and C they are not audible on the ernet that that's a question that
you know will be answered and tests is what would happen if you put a private IP address on a public
interface that's facing up to you.
Oh well we're not going to really going anywhere because private addresses are not ratable on public
network allows but we get private networks every day in our house man.
How was it that we get to the internet bro.
Because we using that network address translation.
We're actually using Path which is point out or translation or dynamic overload where we use one public
address to translate your inside local address to an inside global.
All right.
To get to our audience to go.
That's where we can get to the outside because you must have a public address.
You must have a public address in order to get to the
now the plaza range.
You see that number right there.
I look at that number.
It's a classic.
OK.
Now the actual range of the whole thing.
All the artists OK 10 0 0 1 to 10.
Two firefighters are fighting for now.
Some people may be saying the general is not because you know because each octet has a maximum value
of 255 OK once this reaches 255 it flips this guy over to one resets to zero.
He is going to be fine flips that guy turns into resets to zero.
So for another domino in a car exactly the same thing you're driving along cause you're 0 miles.
You bought a brand new car or brining spanking car zero.
Little things are spinning around.
It gets to nine one mile spinning around in two miles.
Them go 110 and anything like that it goes in order so there's the same thing.
Once it gets to be five when the goals are to be.
If Mrs. Arthur or your to one and then it resets itself again.
So you can have all those addresses that we do at 16 million Sony $777 240 or usable and this is them
ask to 5 5 000 that is the default the D all math of a class A address and I say the fall math of a
Class A address.
OK.
Is that when you see there or do you want to put in insider notation for about a decimal numbering as
they call it now.
It will be a flashy and Buzby range.
So many to 16 year one to one side to 31 2.5 to four using them asking 2 4 5 2 5 0 0 or 2 4 5 2 4 years.
Now those that are here.
I will explain the B and the C have two different maps.
You're always in any test you take on the real world and you put it inside your PCs.
You're going to have to use you know the right math or some other way.
OK.
Yes.
For the class B right here.
How do you think they got these these numbers here is the goggles from 16 to 31.
16 to 31.
How did they just come up with that.
Smoking smoking tobacco and drinking brandy and they said hey we're going to make a 16.
What do you think.
31 for me 31 tomorrow.
So let's do that now.
There's a word though.
OK.
So it's OK to 40 to 40 because they need take those eight bits and you split it and we have the big
valley to the left the 16 OK.
The big the big value right there the big zero whatever the value next to it is 16.
The lvalues to the right.
You got them all up is 15.
So 15 and 16:31 that's they came up with.
But again in any test and again you want further information you can get my book on Amazon or you can
get my people for course online.
I that that's come a black number.
The only place you going to find that is in the Odyssey.
OK.
Or Cisco Press books.
You're the only ones that say that every other book will tell you this.
If I find out.
But it's got confusing because.
OK.
This is true for five years users or that means there's a sea change tens or tens or ten.
What changes is this.
Why does the second author change your Because if it wants to affecting public it was a once too dirty
to public.
So you like well how did they get that number back in the day.
Well I just started to teach I said don't worry about it.
It is what it is.
Memorize it.
That's it.
OSWALD.
OK.
So you research it even further and you find out when you look at Cisco Press books they will tell you
there's break down here.
OK and again just because they took that second off that split it down the middle.
All right.
The big issue right.
You got to move 15 so 15 and 16 31.
That's it.
OK.
Plus the range.
Same thing.
Look one I to 168 you one they got one eye to 168 2 5 5 2 4.
OK.
So you go from zero to 55.
So therapy is always changing the format is 2.5 to a 5 2 5 0 or 2 vital Vives rural all these to never
change is this one that changes.
That's why this will tell you that hey you don't do that.
You don't do.
You'll never do that rule tomorrow unless you're summarizing why you're taking a bunch of little networks
bring them together as one they do something that but you'll never see or classy address normally in
normal circumstances with less you know you know on the third octet less than two or three hours.
That's what we do.
If I decide to revive the last October I'll be either 0 to 40 or 24 or whatever the case may be.
I just know.
And once you're done with this what look at the actual Arfield gone to compressible good or good or
cop whatever.
Find out OK don't just take my word for it.
And that's what we're saying here because we has to sort them out.
I will explain.
And that's an explanation too.
That's it.
An IP address of course.
But I want to give you a little bit extra but actual.
So you know right.
But I think with a 1 2 1 6 8 and the with the 170 to 16 or 7 through 113 to 31 so 17 18 19 20 and until
you get it right to get to 31.
Are private in the outside that is public and well the whole class A is decided to be public they just
and I just give him the whole question.
And that's private I should say private.
Leroy your private rages are only for internal use to do whatever it is you want and for say look at
the company you're a consultant.
Are you going to go build a network.
All right.
And you were lucky enough to get from scratch.
Or they solicit we need to just take this down and build their back up whatever the case may be.
See how big this company is going to grow.
We have we have four computers and one printer.
You need a six port switch in no.
What you think they're not going to get bigger and better and hire more people they need more computers.
Or maybe they want to add another printer.
Oh I know wireless on do the job.
You know you could do it but come on the guy you see you know on an enterprise company.
We can do that.
You'll be dealing with a class a class B range private whatever you won't.
I I know the class area.
Get it in the Cosby range.
But you know you're not maybe Lanzas summits.
Now I want to get into going into routeing and all the so I shouldn't be getting into all this part
of the TCAP IP.
We want to understand TCAP IP model suite because of all the protocols and what they do.
Chuckie.
If it's so full duplex if it's half duplex cabling what is all of that that comes into play with how
we're running protocols what routers were came when you have all this comes into play.
Everything comes into place again.
OK.
This is just one itsy bitsy part.
OK.
Now what would you do.
Very important.
You do need to understand.