1
00:00:01,190 --> 00:00:04,940
All right so let's solve this challenge together shall we.

2
00:00:04,940 --> 00:00:09,950
We've got a 1 9 2 1 6 8 0 0 slash twenty two why did I write this out this way.

3
00:00:10,010 --> 00:00:12,570
Well somewhere to the slash twenty three.

4
00:00:12,710 --> 00:00:18,980
So if we come to a slash twenty two we see that there are one thousand twenty four hosts which means

5
00:00:18,980 --> 00:00:22,350
we have a possibility of one thousand twenty two right.

6
00:00:22,460 --> 00:00:31,750
And all we need to do is fill in the blank on the x 255 255 dot 252 dot 0.

7
00:00:32,210 --> 00:00:33,080
We come across.

8
00:00:33,110 --> 00:00:40,820
We know our first ip here or I.D. is 1 9 2 1 6 8 0 0 first address possible.

9
00:00:40,820 --> 00:00:47,390
Now if we think about this we can kind of do this mentally in our head we can think OK there's probably

10
00:00:47,480 --> 00:00:53,140
two hundred and fifty or so a host and a network and we've got a thousand or so hosts here.

11
00:00:53,330 --> 00:00:55,290
Well that's gonna be about four.

12
00:00:55,340 --> 00:00:55,640
Right.

13
00:00:55,640 --> 00:00:59,140
Four ranges because we've got a thousand divided by 250.

14
00:00:59,240 --> 00:01:02,870
So I'm going to go ahead and go 0 1 2 3.

15
00:01:02,900 --> 00:01:04,240
That's four total.

16
00:01:04,250 --> 00:01:06,850
We'd say 1 9 2 1 6 8 3.

17
00:01:06,890 --> 00:01:08,100
Dot 255.

18
00:01:08,420 --> 00:01:18,050
Hopefully that math makes sense again zero dot zero dot one through 250 for dot 1 1 through 250 for

19
00:01:18,070 --> 00:01:23,180
DOT to one through 250 for dot three dot 1 through 254.

20
00:01:23,280 --> 00:01:26,670
That equals about a thousand and twenty two hosts.

21
00:01:26,690 --> 00:01:27,290
OK.

22
00:01:27,290 --> 00:01:29,960
Actually I lied to you.

23
00:01:30,150 --> 00:01:33,120
The only two we're taking off are zero and two fifty five.

24
00:01:33,120 --> 00:01:39,960
You actually have dot zero through 255 1 dog 0 through 255 all the way.

25
00:01:39,960 --> 00:01:41,710
We're only subtracting these two.

26
00:01:41,850 --> 00:01:44,620
So if you do that math that will add up to ten twenty two.

27
00:01:45,330 --> 00:01:45,610
OK.

28
00:01:45,630 --> 00:01:48,090
So a slash twenty six.

29
00:01:48,090 --> 00:01:55,360
We've got a 255 255 255 dot one ninety two.

30
00:01:55,410 --> 00:02:01,830
Fill in the blanks fill in the x's sixty four hosts we got sixty two in reality and we're gonna say

31
00:02:01,830 --> 00:02:11,720
1 9 2 1 6 8 1 0 and 1 9 2 1 6 a dot one dot sixty three.

32
00:02:11,760 --> 00:02:17,200
Again if we wanted to create a second network we could start here with a sixty four slash twenty six

33
00:02:17,700 --> 00:02:25,260
and we would start with sixty four as the network idea and then one twenty seven as the broadcast and

34
00:02:25,260 --> 00:02:37,320
lastly 255 255 255 dot to twenty four for a slash twenty seven we've got 30 potential hosts because

35
00:02:37,320 --> 00:02:47,130
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.

36
00:02:47,250 --> 00:02:53,910
Same thing here if we wanted to create a second network we could we could say 1 2 1 6 8 1 thirty to

37
00:02:53,910 --> 00:03:00,390
slash twenty seven and then this would start at thirty two and this one would end at sixty three we

38
00:03:00,390 --> 00:03:06,600
can make however many networks within that four to eight I think eight eight different segmented networks

39
00:03:06,600 --> 00:03:08,140
with a slash twenty seven.

40
00:03:08,580 --> 00:03:17,640
So that is it again as I said last video this can be confusing and all we're taking away here is identifying

41
00:03:17,700 --> 00:03:21,420
what this side or notation looks like identifying the base.

42
00:03:21,420 --> 00:03:25,430
That to me is slash twenty four being the most common what you'll see.

43
00:03:25,560 --> 00:03:30,430
Understanding what a subnet mask is and why it's important especially in relation to hosts in the number

44
00:03:30,430 --> 00:03:34,770
of devices that you can have on a network and why you might see something like a slash twenty eight

45
00:03:34,770 --> 00:03:38,610
or a size twenty three or more commonly something like a slash sixteen.

46
00:03:39,090 --> 00:03:45,810
So understand again that slash 24 as you see a bigger number there or you see even you know something

47
00:03:45,870 --> 00:03:52,140
other than three to fifty five in a row understand no host are getting smaller the less 255 you see

48
00:03:52,140 --> 00:03:55,800
on your screen the number is getting bigger for the number of hosts.

49
00:03:55,960 --> 00:04:00,480
OK and just understand how to read this that's all you need to take away again I'm going to provide

50
00:04:00,510 --> 00:04:05,880
additional resources as it provided last video go review them if you don't understand them you can always

51
00:04:05,880 --> 00:04:10,620
come to the discord channel you can always ask Q and A questions this is not an easy topic to pick up

52
00:04:10,650 --> 00:04:13,380
but it is a topic that I had to show you as part of networking.