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Wallow I once again told your private IP addresses what in the world is that you should or are these

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or leaders are only used for internal purposes don't use them with in the company.

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They took the chunk out of the class a class B to class C they said OK you're going to take this chunk

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of addresses and use it internally she could not work inside you know you go around and do everything

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you need to do in general.

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Oh cool.

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I get really half on the first A B and C they are not audible on the ernet that that's a question that

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you know will be answered and tests is what would happen if you put a private IP address on a public

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interface that's facing up to you.

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Oh well we're not going to really going anywhere because private addresses are not ratable on public

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network allows but we get private networks every day in our house man.

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How was it that we get to the internet bro.

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Because we using that network address translation.

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We're actually using Path which is point out or translation or dynamic overload where we use one public

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address to translate your inside local address to an inside global.

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All right.

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To get to our audience to go.

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That's where we can get to the outside because you must have a public address.

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You must have a public address in order to get to the

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now the plaza range.

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You see that number right there.

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I look at that number.

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It's a classic.

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OK.

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Now the actual range of the whole thing.

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All the artists OK 10 0 0 1 to 10.

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Two firefighters are fighting for now.

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Some people may be saying the general is not because you know because each octet has a maximum value

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of 255 OK once this reaches 255 it flips this guy over to one resets to zero.

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He is going to be fine flips that guy turns into resets to zero.

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So for another domino in a car exactly the same thing you're driving along cause you're 0 miles.

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You bought a brand new car or brining spanking car zero.

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Little things are spinning around.

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It gets to nine one mile spinning around in two miles.

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Them go 110 and anything like that it goes in order so there's the same thing.

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Once it gets to be five when the goals are to be.

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If Mrs. Arthur or your to one and then it resets itself again.

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So you can have all those addresses that we do at 16 million Sony $777 240 or usable and this is them

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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

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Class A address.

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OK.

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Is that when you see there or do you want to put in insider notation for about a decimal numbering as

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they call it now.

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It will be a flashy and Buzby range.

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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.

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Now those that are here.

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I will explain the B and the C have two different maps.

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You're always in any test you take on the real world and you put it inside your PCs.

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You're going to have to use you know the right math or some other way.

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OK.

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Yes.

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For the class B right here.

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How do you think they got these these numbers here is the goggles from 16 to 31.

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16 to 31.

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How did they just come up with that.

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Smoking smoking tobacco and drinking brandy and they said hey we're going to make a 16.

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What do you think.

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31 for me 31 tomorrow.

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So let's do that now.

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There's a word though.

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OK.

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So it's OK to 40 to 40 because they need take those eight bits and you split it and we have the big

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valley to the left the 16 OK.

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The big the big value right there the big zero whatever the value next to it is 16.

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The lvalues to the right.

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You got them all up is 15.

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So 15 and 16:31 that's they came up with.

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But again in any test and again you want further information you can get my book on Amazon or you can

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get my people for course online.

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I that that's come a black number.

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The only place you going to find that is in the Odyssey.

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OK.

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Or Cisco Press books.

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You're the only ones that say that every other book will tell you this.

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If I find out.

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But it's got confusing because.

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OK.

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This is true for five years users or that means there's a sea change tens or tens or ten.

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What changes is this.

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Why does the second author change your Because if it wants to affecting public it was a once too dirty

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to public.

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So you like well how did they get that number back in the day.

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Well I just started to teach I said don't worry about it.

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It is what it is.

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Memorize it.

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That's it.

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OSWALD.

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OK.

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So you research it even further and you find out when you look at Cisco Press books they will tell you

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there's break down here.

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OK and again just because they took that second off that split it down the middle.

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All right.

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The big issue right.

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You got to move 15 so 15 and 16 31.

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That's it.

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OK.

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Plus the range.

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Same thing.

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Look one I to 168 you one they got one eye to 168 2 5 5 2 4.

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OK.

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So you go from zero to 55.

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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

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change is this one that changes.

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That's why this will tell you that hey you don't do that.

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You don't do.

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You'll never do that rule tomorrow unless you're summarizing why you're taking a bunch of little networks

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bring them together as one they do something that but you'll never see or classy address normally in

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normal circumstances with less you know you know on the third octet less than two or three hours.

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That's what we do.

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If I decide to revive the last October I'll be either 0 to 40 or 24 or whatever the case may be.

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I just know.

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And once you're done with this what look at the actual Arfield gone to compressible good or good or

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cop whatever.

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Find out OK don't just take my word for it.

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And that's what we're saying here because we has to sort them out.

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I will explain.

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And that's an explanation too.

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That's it.

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An IP address of course.

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But I want to give you a little bit extra but actual.

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So you know right.

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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

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you get it right to get to 31.

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Are private in the outside that is public and well the whole class A is decided to be public they just

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and I just give him the whole question.

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And that's private I should say private.

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Leroy your private rages are only for internal use to do whatever it is you want and for say look at

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the company you're a consultant.

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Are you going to go build a network.

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All right.

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And you were lucky enough to get from scratch.

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Or they solicit we need to just take this down and build their back up whatever the case may be.

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See how big this company is going to grow.

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We have we have four computers and one printer.

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You need a six port switch in no.

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What you think they're not going to get bigger and better and hire more people they need more computers.

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Or maybe they want to add another printer.

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Oh I know wireless on do the job.

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You know you could do it but come on the guy you see you know on an enterprise company.

140
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We can do that.

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You'll be dealing with a class a class B range private whatever you won't.

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I I know the class area.

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Get it in the Cosby range.

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But you know you're not maybe Lanzas summits.

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Now I want to get into going into routeing and all the so I shouldn't be getting into all this part

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of the TCAP IP.

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We want to understand TCAP IP model suite because of all the protocols and what they do.

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Chuckie.

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If it's so full duplex if it's half duplex cabling what is all of that that comes into play with how

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we're running protocols what routers were came when you have all this comes into play.

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Everything comes into place again.

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OK.

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This is just one itsy bitsy part.

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OK.

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Now what would you do.

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Very important.

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You do need to understand.