The Magical Line

16 minutes
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Welcome back, everyone. We're going to talk about what? magical line? Yes. Once you find where the line goes, you can ask for any IP for question asked. That's right.

It's a 32 bit address. The bid values don't change per octave. So if they give you cider, I don't know 18 you're gonna say, okay, a bit on the first a bit on second 16. Okay, that's two more bits on on the third octet as 128 64 so we increment by 64. There you go. Done.

Zero 64 128. keep incrementing 182. That's it allowed us to fix those Other network IDs. It's like that. It's that simple. Okay, you got to know how to do this is just knowing where that line is that dude, you'll know how many holes you have. You can figure out right there by counting by twos like we did.

From right to left, how many holes minus two networks left to right. Okay? Don't minus two. Again, that's kind of tricky. Because if you're using the zero network, not using the zero network, if you're using a zero network, you do not take out two. If you're using the zero network, you do not subtract two on the network side, on the network side.

Okay. If they tell you do not use the zero network, forget about the zero network, does your know or doesn't belong here, then you subtract two. Okay. I hope I made that clear. All right. There's no such thing as having seven hours.

The other half or six, seven. No doesn't exist anywhere in this world. Okay? BS. All right. So anyway, stop talking.

Let's go do a see inside. Alrighty, welcome back now we're in the magical line, we're going to find out exactly how how can we really use this, how quickly we can submit without and still have, you know, be precise, be efficient. Okay? So what I did was, these are a bit values so you can see there's your first octet, second octet, right through a doctor, and then your last doctor right there. So let's say they made it simple for you and they gave you I don't know, cider or 19 whatever you like, Okay. 19 they'll want to know everything.

Tell me everything. Don't give me that give me a number of hosts given the number of subnets Give me the the You know the no I need the network ID the range the broadcast how many hosts you have? Everything? No, no everything about it USA. No sweat buddy. So what you do you say Okay, first eight bits is a round the first eight bits are on X.

Second eight bits are on xy though because I 16 How many more we got Oh 19 123 I the rest are off. Ah 456784123456 781-234-5678. Awesome. All right, so our magical line falls there. What's so important about that? Because indle third octet, we have three bits in our magical line.

That means is right there where that insertion point is blinking right there. That's our increment is 16. Awesome. So we say okay, network. Check this out. Net ID start from zero.

And we come about what I say 16. All right, who picks it? Jesus? Well, no, it's not 16 is three bits on is 3842 Thank God. Yeah, three bits. All right here, right here three bids on 19.

Okay, we're going like 32. Sorry. recommended by 3232, right? Because you have eight and eight is 1617 1819. Right? Our line is right here.

For us, I don't know why it's good that we're increment by 32. Awesome. So zero wasn't the 16th long, zero 3264. We did this already. 32 is 96 and you got 3632 28 and then 160. And then 132 Then to 24 Okay, and that's it because you're going further you're going against 256 that's no good.

All right. So now that I know a broadcast or I will go in the broadcast as put over here. Ah, we said the song right, we said the song we can add the sum or case what was one less 3231? Less 3231 what was one less 6463? Okay, one less 96 or less? Yeah, well that's 9695 one less 128 127 or less 161 59 all as 130 to 181 One less to 24 to 23.

And you know that is going to be 255 because that's the maximum. Now what are we working on? We're working on the third octet, okay, so let's run it the way it should be right? x dot x dot, dot. And this will be x dot x dot dot. What a world what's this one going to be?

I'll just add all these guys up. To clarify, this would be zero. Right? So that will be your broadcast over here. Okay, you can type All right, so we'll be the range, the range of bits in the middle. And again, I'm just going to put the one off, I just do it this way x dot x dot was after zero dot 00 dot one through what before 31 to 5531 to 54.

Because you literally have to find this has to be all the way full right? This has to go away full before this can go down to 30. So it's really 31 to 34, then 31 to 5331 to 52. Once it gets to zero, then it goes to 30 to 5530 to 50. 430 and so forth and so on and so forth. So you can see that we can just do it that way.

Okay, let's do this one. All right, this is going to be x dot x dot. And then it's going to be zero, isn't it? Because they reached the maximum value here, resets to zero brings us to 32. Okay, okay, I'm getting it now. All right, well, then I'll go x dot x dot 63, brought to the divine.

So what's in between x dot x, that 32 dot zero through x dot x, that 63 dot 255. I mean, 34. Sorry. I always bring this guy back over here. Oops. So you see, that's all it is I'm focusing that, hey, we're on the third option is how many offers we're having.

Here we go much better. First, second, third, fourth, first, second, third, fourth, sorry, how many zeros up there? Okay. So that's all there is because this would be 255. Right? This would be 255.

That's it. That's where you get that broadcast from. So you find your network ID, which you did, you're going from an all the way down. Then you find your broadcast address, then whatever's in between. Just remember that octet that you're working on. All right, which is in this case that their doctor actually got 19 bid, say.

All right, let's do another example. as well. Another example. All right, I'm gonna erase all this. Erase all this. Okay, so on.

So I'm going to scroll down notepad and write all that stuff out there. Again, I'm just gonna erase all this right here. Okay, and while I'm up here, no So, let's make it easier. Let's use for the fourth octet not to confuse you can understand the concept. So we're going to use a Okay, we'll make it okay. Zero 26 slash 26, which is the same thing as 255255255 dot 192.

Okay, why? Because there's two bits on last octet. Okay. So now what's our increment? Well, you saw two bits on this right here. So we incremented by 64. it's even easier.

Okay, so what's your network ID? We start with 00 64 128 192. You can't go any higher than that because then it'll be 256. So that's it. Okay. So what's your broadcast, there's the last octet doesn't matter.

Everything else was x x x x zero x x is 64 x x x x 128 x x x is 192. Right? triple x. good movie. All right, one, one less 6463 was one whoops, one. One less 128 127. One less one I do 181.

And obviously, there's gonna be 255. Okay, so what's in between these two puppies right here? All right, okay, there's your broadcast. Write that in there. Okay. All right.

What is it between is the range. What is in between is the range. Okay, so that's what was after zero One was before 6362. Okay, well, there you go. Done. All right.

What's after 6465? What's before 127 126? Well, that's a 128 129. What's before 131 190? Oops Ctrl Z. And then the last one was after 192 193 and was after what?

Before to default to 84. That's it. And the guys in the middle are your addressable right? These are addresses you're going to give. If you have an address within this range, you're part of the zero network. If you have an address within this range right here, you're within the 128.

Network. Okay, and we're using this mask or this cider, cider or ddn. Okay, whatever you want to call it. Well, that's it. That's all there is to that magical line. Because and that's why I always told you that the subnet I mean, yeah, the subnet mask is the key to it.

But then they said, Well, wait a minute, you give me the network ID you give me the host. And even the broadcast? Well, how many hosts do we have? Apparently, this person can't count. Alright, so Okay. All right.

Let me break it down for you. They're sitting in 60. We have the line right here, right? Because remember, 64 how many holes do we have? 248 1632 6464 minus two is 60. So we have 1600 host how many networks we have That's tricky.

Okay, I didn't put an actual IP address, but we're going to assume it's about word two, we're going to assume that the class C meaning is a 192 168. One, okay? That means that you can go this way, you cannot go this way. Okay? It's not a class see how many networks we have 244 networks, because we're using the zero network, we have four networks. Okay?

It would have been a Class B, then the line would be here. So then I can start counting from here as a two for a 1632 6428 to 36 by 12 1024. And then I will put down 24 hours. See, because we're the class B, we can move the line all the way to the default, which is all way up here. If it's a Class A, well then our line would be right here. And then meaning not the magical line allows will be over here.

But I can move my line all the way up to here if I wanted to because there's a class a network, and then that's a class full boundary. So then I can start counting networks. Here we have CS, 5005 and 36. And you can count the other two if you want. Alright, so we're gonna have several hundred thousand networks. Okay.

But again, that's what I'm trying to show you is, once you draw that line, it will give you everything, number of hosts, number of networks, your broadcast, your range, your network, ID, it gives you everything. It gives you everything that you need to know, okay? That's why when you go to take your test or you're taking or wherever college certification doesn't really matter. I and once you get used to this and you memorize that table, you can do it in your fingers. Okay, and you say, Oh, I went from my 3232 Okay, we need to get to this number though. 2640 120 Oh, yeah.

A broadcast is 127 Yeah, the IP, the ranges that you're nodding your head, but you got to go that table, you got to know that table. That's all there is. You can be really quick with this with this line. Once you find this, it's over. You know this. You can get this by saying one less, one less, one less, one less.

And then whatever is in between, now sure range. Cool. Seeing the next one

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