All right, we made it through this particular section, ah, kind of repetitive. We have some naming convention, I guess I would need to learn, like, block sizes. Okay. But you know, your modular design, which is the same as a hierarchy design, we have redundant design, which means you need redundancy in a network, really, we know this. Okay, so topics covered, we know the difference between collision broadcast domains. And we'll of course, if we create VLANs, because we're creating extra broadcast domains, meaning decreasing the amount of broadcast, you're going to have to use some sort of layer three device.
Now all the switches you saw there were multi layer switches, whereas switches that you turn on IP routing, and then you can do you know, rip whatever You can route with those switches as well. So but you do need a device that will support layer three modular network design, we saw that we saw the modular designs the same thing as a hierarchy design, that it fails. In what aspect redundancy? We need redundancy, right? Because if you don't have redundancy, if one link goes down, you're out of guys, but who's not up to you can suggest all you want. You can do your site physical site surveillance isn't land, right?
You know, do wireless, you do your physical site survey, you go out there You say, Well, Hey, boss, we're going to need about you know, I don't know 20 boxes of cat six cables, because we need to run at least two runs or three runs per is gonna be like, Ah, what, how much is this gonna cost me and that's where the problem comes in. Alright, so how much redundancy has your pocket can hold? Okay, switch blocks core distribution. And access, meaning your core leave it alone. Leader core alone says organize more than one core, there are gonna be more than one distribution. And all depends how many distribution switches, you have to see how many access switches you have.
But the point is that you leave your core alone, because it's going to that's the one that goes to the other buildings to the other campuses going across geographic locations, ah, the distribution and access like the other call blocks, which means you put them in different segments. We're physically segmenting them putting in different places, right? You're separating them because what are you doing? We're trying to diminish broadcast. Okay, at the same time you create VLANs. And we know not to put 2000 people per segment per VLAN.
Because all that you're defeating the purpose of what the VLAN is for minimizing the amount of noise. Okay, and then we looked at the collapse core. We've seen it before. Now. You saw it. Distribution access distribution access and then core connected to both.
Okay, that's it. That's it. That's all there is to that. You see now before we just reiterating given a new names, that's it. Okay, so I'll see you in the next