Subnetting example explained |
| Written by Mihai Dobos | |
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In this tutorial, I will show how to calculate subnets, network addresses and the number of hosts within a given IP and subnet mask.
We have the IP address of 192.32.65.10 with a CIDR (Classless Interdomain Routing standard) notation of /27. We have 3 IP classes to keep in mind:
A: 1.0.0.0 -> 127.255.255.255 with a mask of /8 by default These are specified by international organizations. We conclude that our IP address 192.32.65.10 is in class C. So by default, we have 24 bits for network part. But we applied 27 bits for this part, so 27-24 = 3 bits used for subnet. Keep this in mind.
Q: How do we calculate the number of subnets?
Q: How do we calculate the network address?
192.32.65.10=
1 AND 1 = 1
written by Ced , February 28, 2008
1. If you worked on an older network that could not interpret classless addressing, and your network ID was 145.27.0.0, what is the theoretical maximum number of different subnets you could create on this network? 2. You have decided to create 254 subnets on your Class B network. What subnet mask will you use to accomplish this? 3. If you subdivide your Class B network into 254 subnets, what is the maximum number of hosts you can assign to any single subnet? 4. Your company has leased a Class C network whose network ID is 205.61.128.0. You want to create 16 subnets within this network. One of the subnets will have an extended network prefix of 205.61.128.64. What will be the broadcast address for this subnet? (Hint: If you know the number of hosts per subnet, you can easily determine the broadcast address.) 5. What is Supernetting 6. How do you calculate a default gateway
written by Mihai Dobos , February 28, 2008
Hello Ced We are more then happy to answer your questions, but this does not include your homework assessments. To fully understand subnetting, read our tutorials related to this topic and do some exercises.
written by Boley, Emmanuel , March 16, 2008
can you send me a more detail lesson on this subject to my email box to help me out. Thanks. Boley
written by Boley, Emmanuel , March 16, 2008
The stuff is good and i like it...it comes down to your level. Even my kid knows what's in it to learn. Thanks Do you need more help? Ask now!
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| Last Updated ( Thursday, 28 February 2008 ) |