We made it through somewhere else section. What do we learn? We learn how to calculate Walker mass two methods. Aha, come on 250-522-5225 25 that's your constant, your math 2525 35, zero, subtract it. Whatever your mask is, you saw I showed you there a couple of examples. Simple, Simple, Simple.

Or if you already subnetting and you have your magic online, your broadcast calculation number or numbers, those are Walker mass because the axes are zeros. That means much exactly. You saw that I knew how to get the mask, the cider the dotted decimal, I knew already. Why? Because I know the bit to decimal table. I know the conversion.

You need to learn all that. So watch these lectures over and over and over again. All right. And then we saw the examples. Now they could give you an OSPF question, right or example here it will print out with OSPF or even the ARV, or an ACL or Nat. And it could be a wildcard mask issue.

That's why you need to know this. Okay? Because we use it. When we do all this. We use them to permit to know what network we're on to allow people to do certain things, you know, to use the NAT. Okay, I showed you what what happened in Pat.

They can mess up people. Even if you have one IP address, you put overload, but you put the wrong wildcard mask. Yeah, you're, you're done. Okay. So it's important that we know IPS left and right. Especially now especially but when we're doing walk our masking, because it's kind of weird.

Looks weird. All right. So what you need to know how to go back and forth. It They give you a walk on math. You should know the subnet mask. Period.

You should just know it. That's the way it is. That's the way I want you to know. cn ns