Subnetting By Hand
ฝัง
- เผยแพร่เมื่อ 8 มิ.ย. 2019
- Subnetting by hand...yes! This is really helpful for those studying for the CompTIA Network+ exam, and for those who are about to go on a technical interview.
Sometimes, you just don't have any paper to do the subnetting math with, but you always have your hands with you. Learn to answer subnetting questions quickly by using hand in this video.
This video comes from my CompTIA Network+ course available at DionTraining.com and on Udemy. I hope this helps some of you who are struggling with subnetting.
![[UNCUT] ฝันรักห้วงนิทรา | EP.8 (4/4)](http://i.ytimg.com/vi/RDYJYiDwsj0/mqdefault.jpg)
This is the best subnetting video I have found by far. Thank you very much!
Glad it was helpful!
This and Messers 7 second subnetting is godsend for understanding it.
what about subnets with a " /
I love this, I can't believe this isn't used more.
Holly Molly, if only my former teacher had taught me this way...
Thanks a lot Jason.
Jason, you are good, much appreciated.
This dude is a genius thank you.
I had a hard time understanding the left hand side compared to the right. Basically the way we count its not consistent left versus right. On one hand, it should be like you said, "up from there". so meaning if its /26, its up from 24 so we count 25 (first finger) and 26 (2nd finger). On the other hand, we DO begin counting the 24 (256). It took me a while to understand the difference from networks\subnets versus the amount of IP addresses.
In other words Jason, what I was trying to convey, is that your explanation makes sense, but keep in mind that from our perspective, we right away assume its the same way we count left and right, and it would be better to explicitly clarify that potential confusion. Thank you for the effort you put in these videos and all this feedback is with good intention.
Agreed, this system seems to work but your explanation is lacking.
@@ben2mx As he pointed out, he had already taught about subnetting in previous lessons. Regardless, /24 is in itself a subnet, the single subnet network, hence the first finger and thereby the greatest amount of hosts. And he didn't lack in explanation because the illustration of him doing it, which he did many times, was the explanation and literally shows how it's done step by step..
@@JacksonCampbell For those that choose not watch the series, a recap would've been nice.
@@JacksonCampbell for us new ppl that just became aware of this method through this video alone. I was confused also. @Ben2mx comment made me to be able to comprehend. Remember everyone is not starting from the same place.
Incredible.. It took this video for everything to make sense. No more wondering if I'm right or wrong. Now I understand it all. Thanks!
Glad it helped!
Dude, you just helped me so much. Thank you
Great explanation. This, I can remember.
Yaaaayyyy I finally get it. Thanks Jason 🥰
You're a godsend! thank you so much!!!!
That's brilliant explanation sir.
This video is great! I spent a lot of time reading about subnetting and various other videos, but watching this really wrapped things together. For those wondering, yes you can use this method for cidrs that are less than /24. I just used it while taking a 30 question practice quiz on examcompass and got every question correct using this method, lots of questions with cidrs of /9, /20, /17, etc..
Just to add, I recommend you spend sometime really understanding the foundations of subnetting before starting to learn this method. Wrap everything up with this video and you will be good to go.
omg this helped me so much thank you, my ccna 2 class will be so much easier now
love this method.
This looks pretty cool. May have to look at your other videos first probably but I work as Network Admin. I need to understand what they are and if someone asks me some info on it to be able to do it quickly.
Super helpful TX
Did that guy just flip me off /30??? Just kidding! great video Jason I love your courses. They are very helpful and educational!
Watch that finger!!!! 4:42
Why for the ips from right to left he's starts with slash 24 but for the subnets from left to right its slash 25?
because there are 256 ips in a /24 network? that's my guess. if 0 and 255 are included that is 256. I could be wrong but don't see any other way out.
I feel he went through how to find the Network ID, Broadcast ID, and 1st/last useable IPs fairly quickly. Can anyone elaborate on how to find these using the method shown in this video?
what I got from it is that you gotta just guess it based on the multiple choice answers for example if it's asking the host ID, I'd bet on the next number closest to a squared below it for example if the last number is .140 and one of the options is like .32 .64 .128 or .192, I'd guess .128 since its below it and I'd gues that the .192 would be the broadcast. It's nearly impossible to find that using this method I think
I had questions on the Network+ exam about subnets less tham /24. I remember one was /13.
I’m taking it in 3 days, can you elaborate?
Oh I think I know what you mean. The chart I memorized for it has /1-/32 listed, and all networks and devices with them.
@@jakepayne2985Did you pass? And how hard was it?
Great info but it would have made more sense to film the hands from the other direction so that we see it just as we would see looking down at our hands instead of how we would see it if you were standing in front of us. That way you don't have to explain my left is your right and my right is your left and potentially confuse some people
Do you sell these for use during the exam?
WoW... But can this method apply to /23 /22 /21 etc? Or class B and A networks.
Yea I still don’t get it lol
NET+ PEOPLE:
Memorize this and trace your hands out on the paper at the testing center.
Do this before you click through the agreement and start the test. In person testing is required to give you blank paper and a pen and they will allow you to write out anything you want from memory
If you memorize this you should be able to trace your hands and number each finger in about 30 seconds
No mention of class id
why do we always start counting from /24?
I mean what if i had xyz/24 or /23
This!
This is fucking perfect. Thank you
???????
@ 2:59 dude you telling me its that easy woww lol
Wait, why do you start counting at 24?
right im so confused
Don't understand when to start with 24 or 25... You start with 24 on one hand and 25 on the other at different times and don't explain why. Can you clarify?
25 when counting # of subnets. 24 when counting # of IPs
7:45 when he is lookng for subnets it's 2 because it's (his) right index finger = 2 but then he goes to "256" which is actually (his) left index finger which he starts at 24 earlier, how is it 256 and not 128?@@gfjfjufidi2880
Not bad
it's actually only 14 host's for the 56.187.210.21/28 example
16 subnet 16 ip 17 host
USEABLE hosts yes. network id and broadcast ip are reserved.
this is quite confusing
Very very confusing
WTF, Pennywise the Dancing Clown over here with the hands. I can just look at a chart, yeah?
Haha! During an interview, you won’t have a chart with you but you will have your hands!!
@@jasondion oooooooo, good point Jason! Haha I was just poking fun anyway. My network + exam is this Friday (3 days) !