subnetting is simple
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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
ip address
This video was a great help, thank you so much! 🎉
Much obliged.
Excellent!
Amazing!
Wow, it's been years since I learned subnetting thru college. Your video is so DANG simple. Thank you so much Sunny!!
yes but the third position is not subnet mask ,but call CIDR notation
Thank you for your work
Nice, very Good
Thank you Sunny. This sunny table is very helpful and easy to remember. Maybe your next example could be how you can borrow an octet digit when the starting IP is in the middle.
Came here after reading the hilariously poor explanation of subnetting in CompTIA CertMaster Learn lesson.
I have a feeling I'll be coming back for more videos very soon 🙂 Thanks for doing what you do!
Needed to get my brain round this for my cybersecurity certs. What an incredible explanation, so clear – thank you!
Great Tutorial!!! Thanks!!
Mind = blown
Please can you tell me how you derived -2 when you were calculating the no of usable host ID. I understand all others but would like to know how -2 came about. Thank you.
This is amazing but my course self-tests seems to always disagree about the number of hosts :')
"min 6 subnets" is somehow a /30 instead of /27 network :/ I don't understand what they're doing
Really good
my life was changed now
Dear Sunny,
Thank you for this great video. I am new to this field and this video easily explained the principles in a great way. The table is great and makes perfect sense.
MEN YOU ARE GOOD ON THIS. I WISH I NEW YOU BEFORE
Thanks