Want back classes of addresses.
Wait a minute lies when you talk about that Marla
in a previous lecture we have to learn the network address range that you say was from 0 to 127 but
we need to know the actual range.
We can use word on that.
Are we looking.
Because you need to classify and address.
We don't do that and I think what we must do it and I it for all because a range can be zero to 127.
Why is that.
Because zero is reserved.
OK.
Four rounds for deep R-AZ 127 is reserved for a Y for loopback addressing.
For testing the DCB IPs that the all 1:43 range so you cannot include that in the range and what you're
looking at these numbers that they said.
So I took out the zero and I took out the 127 I put one through 126 would it to look at the first I
said we got four on the first second third and fourth.
So the first of it is you need to classify an address when you look at the first arc is said oh that's
innate or that the be all that to see all of the I don't know because hey that's experimental or you
want to look guys in black holes may come pick me up.
OK.
So for a class A address you want to 1:26 do you see an address that has any other values within this
range right here.
It is a class address.
Why do we need to know all this.
Why why why.
Because the Class A address is a default mask of two by 5.
0.00 offsider eight classes in domain writing SEE ID are.
It has a slash Hades which means it's the first octet then the rest can be whatever that means you have
Malins.
I'm going to tell the exact number we don't know it's 60 Minutes and that doesn't turn 60 minutes to
even though.
OK you need to know that a million of addresses that you are using a class day.
And why am i stressing out about this.
Because when I was in the classroom post something that's for companies will come to me and tell me
they like I have a situation where my client ran out of private IP addresses where classi I.
How do you want out of class the address.
I mean I can see you wearing our classy dresses but did you not at the thought to say hey.
Asking the big question.
How big do you think this film is going to grow.
How many actual networks are you going to have out there.
Why use unclassy.
The college that I work for many many many many years.
All right.
For for the students I they only use the class B a default class we are great because they didn't realize
or segments or anything like that and believe them all.
Even those in the school.
OK.
And then the one for administration where there are only like 130 people that use the Class-A OK.
So if you had that available why would you.
You need to know this.
So you know OK what class of address am I going to need.
Now obviously we're looking at there's really going to both public and private ranges and we'll talk
about both.
OK public ranges are around on the Internet is what you get from your ISP but you get all your eyes.
Hey listen I have millions of people that I've got I supply a public IP address for give me millions
of ID and they'll give you something for the class.
Ok if you don't do that you are going to be going back over and on on internet.
Oh man we need more of these.
No you're not going to do that.
OK.
Here's an example.
One two three four.
Fifty twenty two one two one or 126.
And just so you know that 126 supervisor Vitaphone for the last available IP address.
I did that on purpose.
It's the last available address on that particular range.
OK.
Need to know that you need to know that B there is the range that they told you you know in the previous
lecture blah blah blah.
All right.
That's what it is in binary.
When they're cool it is 128 to 191 by class-B address.
So anything when they want twenty one when anyone class-B Why do you need to know that because you're
allowed 65000 plus addresses 65000 plus addresses.
So you know if you're working within a class B that's where you're going to get.
So no the network you're in.
So you know what class of address you need to have and again you're looking at the first octave.
And your examples on you know first off 130.
Here's another one for Dr. 168 where I upload all of this up or we want to say one every two backwards
and then one out you want 2.5 to Vita before the last available one before we reached the class scene.
Right.
Previous lecture they gave us.
OK.
I mean I type all while one to two to three.
Yes that's correct.
When I try to do three anything within that range.
All right is a class C address.
Let me stress this now to which I haven't.
Some math.
I said is the key to answering all your questions.
OK on I Bulos but the math does not make a class of address I'm going to say that let's say you have
a $10 one the one that one the one are you using a class C.
People call it sort of amass 2.5 to four if I can provide that zero.
They said oh it's a class C now what.
It just magically turned into the class C No.
If the first octet is within the range 1 through 126 I don't care what the math you have in the back.
OK.
That is our class 8.
It is a sudden get it class 8.
But as a class 8 nonetheless.
So whoever is spreading this rumor out there that your supplement math dictates the class of address
they are insane.
OK.
And then to go back to school.
All right.
No.
All right.
Now do they have deep puppet.
Of course.
OK.
But you have a class A with or 2 5 5 2 5 5 0 0 that doesn't turn it into a B.
OK.
And I give you examples and I'll give you the last word.
Two to three not to provide advice for which is actually the last one.
I last usable usable word usable I'd love to put that word into us.
The range is for multicast to for to deny.
Here they are the ones that you need to know.
OK.
Yes.
Multi-course is an IP address that we can use so we can go ahead and everybody join and watch videos
all together you know in a web ex version and we can have a conference call all in the same multi-game.
Yes that's true.
So true but more important than that is what you're here for which is routing.
All right what you're doing with Birgeneau or N.G. I and you obviously would be in or I 3:6 sex f e
0 0 or F of ch f EF 0 2 colon colon nine.
Sorry if I've zero power of zero zero to call going 9 5 will be IP Benji but in IP for Rip version 2
will be 2 to 4 years or 9.
That's the address that he uses to send updates to its neighbor.
OK.
It uses 10 was to 5 x y or SPF.
If it's a multitasked environment multi broadcast I should say.
All right.
Well let's say I was waiting for I was going to test which does one broadcast domain right there.
Well Gainsville there are all like a frame relay why you're going to have designe a router or and a
bag of buzzing in order.
And that's why these two are addresses belong to that one says the two dozen they're rodder.
No one thing that everybody else.
These are the address that you do know these are the address of the you need to know more important
than anything else.
OK.
Well you know Margaret Some of them will ask you that webinars one or question.
But anyway this is what you need to know.
This is what multicast are used and you need to understand.
OK.
GLASSIE again is a black ops rating now using national networks and your your competitors buma you try
to put it in there and on trial.
It's going to Trumans you up and do it.
So even though any book out there it's all there and I guess that their frustration is that it's used
for scientific purposes what in the world is I mean.
OK I understand there's guys out there and I'm saying white coat whatever.
Doing all these different things are for God to be nice and use a little bit more cool on it.
All right.
But I don't use it Dorina don't use it you don't use it.
OK.
So these are your classes A B C D any non-New all their ranges as far as to classify them in the first.
OK.
But now in the next section or in the next lectures you think you're going to see more private viewing
either.