IPv4 Subnetting - Finding the first valid host in a network

This video shows how to find the first valid host in a given subnet:
What is the first valid host on the subnetwork that the node 192.168.233.145 /27 belongs to?

[wolfkermek]

You made this so easy to understand, absolutely stellar

[jiujitsuprepper]

First video that actually explains this stuff. Thank you!!

[haidinhvo]

Simply brilliant. Thank you very much.

[AlexandersDiary]

Thanks, Patrick, this is great! Would you do the same with a Class B IP, where you need to work on the 3rd octet? That's a bit of a challenge for me at the moment.

[maryamhadeli]

i am a beginner, you explained very well and so easy. thank you very much.

[chrisavela]

I honestly don’t do it by binary. I did it in my head and came out with 129. Here is how I did it step by step.

1) 32-27 = 5. Then 2.2.2.2.2 = 32 host per subnetwork. And there are 8 total of 8 subnetworks. If you multiply 32 times 5. It will give you 160. So you gotta multiply 32 times 4 and add 1 in it

[noorulamin]

Thanks alot undersrand in very easy method...✋✋

[Verum_Rex]

At 2:08 what does 17 represent? I am little confused on what exactly is that number used for?

[crazymido]

what if the node was 192.168.233.145/20? what are we going to do with the last octet ? please solve it with video ??
i really couldnt understand it without your help, you are the best by far

[jac]

what if the node was 192.168.182.25/26 please help with this one

[bushra]

this method doesn't work for every ip address like 10, 1.1.55/25 it won't work on it