subnetting is simple

Please support my channel by becoming a Sunny Classroom member. Your support is much appreciated.

Class B ID - Subnetting
Subnetting a subnet
VLSM subnetting - CompTIA Network + Simulation Question & Solution
VLSM Subnetting - subnetting a subnet

A subnet is a logical subdivision of an IP network. The process of dividing a network into two or more networks is called subnetting. In this video, I will use an example to demonstrate a simple way of subnetting.

Some background links

Example used in the video:

One day your supervisor walks to you, saying: “here is the network ID 192.168.4.0/24, please create three separate networks or subnets for a coffee shop: Sunny Cafe.” The three separate subnets/networks are: One is for the office, one for the front desk and storage room, and one is for public use.

Your task is to list each subnet network ID, subnet mask, Host ID Range, # of usable host IDs, and Broadcast ID. One last question: How many subnets are wasted after subnetting?

Subnetting Practice

With the same network ID: 192.168.4.0/24, you are required to get 6 subnets. List each of new network ID, subnet mask, host ID range, # of usable hosts, and broadcast ID. One last question: how many subnets are wasted after subnetting?

Answer for your reference:

We will have 8 subnets. subnet mask is /27 for all 8 subnets. The number of usable host IDs is 30 for all 8 subnets. I list below 8 subnets’ network ID,host ID range, and broadcast ID in the order.
#1: 192.168.4.0, 192.168.4.1-192.168.4.30, 192.168.4.31
#2: 192.168.4.32, 192.168.4.33-192.168.4.62, 192.168.4.63
#3: 192.168.4.64, 192.168.4.65-192.168.4.94, 192.168.4.95
#4: 192.168.4.96, 192.168.4.97-192.168.4. 126, 192.168.4.127
#5: 192.168.4.128, 192.168.4.129-192.168.4. 158, 192.168.4.159
#6: 192.168.4.160 , 192.168.4.161-192.168.4. 190, 192.168.4.191
#7: 192.168.4.192, 192.168.4.193-192.168.4. 222, 192.168.4.223
#8: 192.168.4.224, 192.168.4.225-192.168.4. 254, 192.168.4.255

[shimmy_fpv]

tfw when you pay 10k a semester for school and a free YouTube video does a better job at explaining networking concepts than your professor

[CharissaMorales]

I took a class on this and completely did not understand. I watched this video once and I'm able to subnet. This man deserves a Nobel Peace Prize. I love you Sunny!

[bagelsforall]

Professor Sunny is a national treasure. A patron saint of Network engineers.

[Richie]

It took me 6 months to learn and master subnetting. However, your video made it so simple. You made a huge difference. Students can learn so much from your subnetting videos instead of spending hundreds and thousands of dollars in the classroom. You are the best!

[Felix-vehs]

6:00 you explaind me in 6 minutes what my IT Teacher could not in a whole Year

[Saavykaas]

Sunny! I just got out of a Network+ exam which I passed, and memorizing your subnetting table and writing it down the moment I was allowed to write notes during the test was critical for answering 2 of the test questions correctly. Considering how close my passing score was, I give you and this video in particular significant credit for it. Thank you.

Also, your accent - while very obviously Chinese - is clear enough that the *vast* majority of English speakers could understand it. So don't worry about the accent. Its certainly better than what I could do in any Chinese language or dialect!

[KwispyKweam]

This is so much easier to understand than looking at a CIDR notation chart. Thank you for this!

[JonathanGonzalez-kzig]

This is insane! I have been studying subnet concepts for the past 4 days. I have been in a classroom for a total 8 hours this week. Read a full chapter twice and still could not totally grasp it. This video made the whole week! Thank you so much for the explanation. I guess I will start taking some time to see videos before attending class. BTW, your English is way better than most instructors. The pace made it a lot more easier to understand.

[Chris-onbt]

Dude, this is killer. I have read probably 4 or 5 books on networking and never really grasped the concept of subnetting, but in 13 minutes you made it clear for me. Great work!

[jlewis]

And just like that, a whole semester of Subnetting confusing cleared up.

[xGUNjrx]

Man @Sunny Classroom, I just have to thank you so much. I am bouncing between about 4 online CCNA courses, a few different Youtube videos, and online explanations, and I just could understand bits and pieces of subnetting. I picked up the binary conversions, how to turn a slash notation into decimal notation, etc. But I had a very hard time grasping the concept of how to lay out subnets from a single network ID. As someone with ADD, struggling every day to get this, trying to better myself, I am just so grateful that I stumbled upon this video. I literally just typed in Fun Subnetting on Youtube and your video was the first to pop up. You made this very simple as the video title states. I just opened up a word document, added a few tables, made the Sunny Table, and then did the rest, checked the video after to make sure I did it correctly. You are awesome!

[lance]

5 YEARS AGO and still helping people out with this. Been scratching my head for months on this and watch your video and grasped more in 13min then I did many courses....Thank you.

[gam]

I thought I didn't have the brain capacity to process the concept of subnetting, maybe I'm stupid. but sunny has really pushed that information into my brain in a way that it is actually processing it. Thank you Sunny!

[itseernest]

Just like that, I understood subnetting in 13 minutes. Thank you for your very concise and clear explanations. This was so helpful.

[pfthomasiii]

It's never a bad idea to search for a great teacher! Not many have the gift of conveying information like you do Dr. Sunny ☀️

[davidmatos]

Totally agree with all the other comments here! Your video took a topic the textbook made overly complex and conveyed it perfectly in just 13 minutes. Amazing and incredibly helpful! Thank you, Sunny!

[johnmarrs]

There's nothing better than an EXPERT who can explain things in a clear, easy to understand way. Thanks, Sunny!!

[keyofgreatness]

My IT teacher directed my class to your channel because he loves the way you teach. You explained this wonderfully, I understood it so much better afterwards. Thank you so much for what you do!

[JessSuarez]

Prof. Sunny you have really explained this in a way that has allowed me to stop pulling out my hair. You sir are amazing!!! I tried many sources, and this was short, quick, but so impactful. Thank you so much!!!

[Dubes-ngfm]

Crazy how 13 minutes has helped me understand more than multiple text books and classes couldn't. Thanks for the video.