Original subtitles

All right so let's solve this challenge together shall we.

We've got a 1 9 2 1 6 8 0 0 slash twenty two why did I write this out this way.

Well somewhere to the slash twenty three.

So if we come to a slash twenty two we see that there are one thousand twenty four hosts which means

we have a possibility of one thousand twenty two right.

And all we need to do is fill in the blank on the x 255 255 dot 252 dot 0.

We come across.

We know our first ip here or I.D. is 1 9 2 1 6 8 0 0 first address possible.

Now if we think about this we can kind of do this mentally in our head we can think OK there's probably

two hundred and fifty or so a host and a network and we've got a thousand or so hosts here.

Well that's gonna be about four.

Right.

Four ranges because we've got a thousand divided by 250.

So I'm going to go ahead and go 0 1 2 3.

That's four total.

We'd say 1 9 2 1 6 8 3.

Dot 255.

Hopefully that math makes sense again zero dot zero dot one through 250 for dot 1 1 through 250 for

DOT to one through 250 for dot three dot 1 through 254.

That equals about a thousand and twenty two hosts.

OK.

Actually I lied to you.

The only two we're taking off are zero and two fifty five.

You actually have dot zero through 255 1 dog 0 through 255 all the way.

We're only subtracting these two.

So if you do that math that will add up to ten twenty two.

OK.

So a slash twenty six.

We've got a 255 255 255 dot one ninety two.

Fill in the blanks fill in the x's sixty four hosts we got sixty two in reality and we're gonna say

1 9 2 1 6 8 1 0 and 1 9 2 1 6 a dot one dot sixty three.

Again if we wanted to create a second network we could start here with a sixty four slash twenty six

and we would start with sixty four as the network idea and then one twenty seven as the broadcast and

lastly 255 255 255 dot to twenty four for a slash twenty seven we've got 30 potential hosts because

we've got thirty two minus 2 1 9 2 1 6 8 1 0 and then we're going to do 1 9 2 1 6 8 1 not thirty one.

Same thing here if we wanted to create a second network we could we could say 1 2 1 6 8 1 thirty to

slash twenty seven and then this would start at thirty two and this one would end at sixty three we

can make however many networks within that four to eight I think eight eight different segmented networks

with a slash twenty seven.

So that is it again as I said last video this can be confusing and all we're taking away here is identifying

what this side or notation looks like identifying the base.

That to me is slash twenty four being the most common what you'll see.

Understanding what a subnet mask is and why it's important especially in relation to hosts in the number

of devices that you can have on a network and why you might see something like a slash twenty eight

or a size twenty three or more commonly something like a slash sixteen.

So understand again that slash 24 as you see a bigger number there or you see even you know something

other than three to fifty five in a row understand no host are getting smaller the less 255 you see

on your screen the number is getting bigger for the number of hosts.

OK and just understand how to read this that's all you need to take away again I'm going to provide

additional resources as it provided last video go review them if you don't understand them you can always

come to the discord channel you can always ask Q and A questions this is not an easy topic to pick up

but it is a topic that I had to show you as part of networking.