In the previous video we already learn subnetting first case, which is we have 100 PC. 2
Now in this video, we are going to learn about subnetting again, but with different case. 3
In this case we will have 12 PC. 4
We will doing subnetting calculation for 12 PC. 5
We are going to calculate which prefix is the best, Total IP, Subnetmask, Network IP, 6
Broadcast IP, and Range IP. 7
Actually this is same with previous video, just with different case. 8
Okay let’s just start. 9
We will start by finding the best prefix we can use. 10
Here we have 12 PC. 11
Let’s try to remember the powers again, 2 to the power of 1 is 2, 2 to the power of 12
2 is 4, and 2 to the power of 3 is 8 13
And the next 2 to the power of 4 is 16. 14
We can stop here, because we just have 12 PC, and here we can see that we already have 16 15
This is the best choice for 12PC. 16
Because the next power, 2 to the power of 5 is 32. 17
This is to much. 18
And 2 to the power of 3 is not enough. 19
So the best choice is 2 to the power of 4, which is 16. 20
Now let’s calculate the prefix. 21
To find the prefix, we can just minus 32 by 4, and we get 28. 22
So the best prefix that we can use for 12 PC is /28. 23
Now we need to determine which range IP we will use. 24
Remember that we must use Private IP, so we can choose between 10.0.0 or 172.16 or 192.168. 25
In this case, we are going to use 172.16 26
Let’s say we will use 172.16.10.x, remember that the first third numbers will never change. 27
But the last number will be change. 28
If we see here, we have 172.16.10.x, this is included in the Private IP Address seconds range 29
and the prefix that we will use is /28, which is the result of our calculation before 30
Okay I think enough for this video. 31
So we already calculate the best prefix that we can use and also we already determine 32
which IP we will use. 33
In the next video, we are gong to calculate the Total IP, Subnetmask, Network IP, Broadcast IP 34
and Range IP. 35
But before you watch the next video, I suggest you to try calculate all of this by your self 36
After that, you can watch the solution in the next video. 37
You can evaluate your calculation is correct or no. 38
Okay, thankyou for watching and see you in the next video!