11 Replies Latest reply: Apr 18, 2013 4:21 AM by Prashant

Subnetting questions

Hi,

Does anyone know any websites where I can practise my subnetting so I can see if I;m ready for my ICND1 exam?

Thanks

• 2. Re: Subnetting questions

Hi Gonzo,

You may want to check out the Games Arcade page here on the Cisco Learning Network where you will find learning games on subnetting, binary, and more.

Regards,

Rigo

Cisco Learning Network Moderator

• 3. Re: Subnetting questions

I used http://www.subnettingquestions.com/  to study before I tested. The questions are not too tough, but the repetition helped me a lot.

• 4. Re: Subnetting questions

as lee stated before. http://www.subnettingquestions.com/ is the best website to practice the subnetting questions.

it has questions in all formats and they are random everytime you open the website.

so its good for practicing.

Regards,

Suraj

• 6. Re: Subnetting questions

The best site I found is - http://www.subnetting.org/

• 7. Re: Subnetting questions

Class A [0-126]            /8 = 255.0.0.0            = 11111111.00000000.00000000.00000000

Class B [128-191]       /16 = 255.255.0.0          = 11111111.11111111.00000000.00000000

Class C [192-223]       /24 = 255.255.255.0          = 11111111.11111111.11111111.00000000

128,          64,          32,          16,          8,          4,          2,          1

128,          192,          224,          240,          248,          252,          254,          255

/11 = 11111111.[11100000].0000000.0000000

2^(3)=8 (number of subnets)

256 / 8 = 32 (subnet partition size/ multiple )

32 - 2 = 30 (number of usable hosts per subnet)

0..32..64..etc

0 is subnet zero of first subnet

1 is first host of first subnet

30 is last host of first subnet

31 is broadcast of first subnet

32 is subnet zero of of second subnet

33 is first host of second subnet

62 is last host of second subnet

63 is broadcast of second subnet

64 is subnet zero of third subnet

.

.

.

• 8. Re: Subnetting questions

Hi Gonzo,

One thing i can advice you to learn quick and fast is to subnet from a situation where you get a subnetmask you're not familiar with. For instance, you need a network with 254 hosts, 56 hosts and 48 hosts and you are presented with the network: 192.168.0.0/22.

Don't be confused with the /22 mask with a "Class C" address. Just saying that you need to be prepared for all available scenarios once you are, you are prepared well enough for the exam! Because you may run into questions and scenarios you have not practiced before, the exams test your knowledge very thoroughly.

• 9. Re: Subnetting questions

Hello Gonzo

You will get an idea about subnetting.

HTH

Annamalai

• 10. Re: Subnetting questions

Thanks guys, I got my CCNA in December and I'm now on my CCNP studies

• 11. Re: Subnetting questions

Hi you can try for IP subnet calculator for verifying subnetting.