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Subnetting for CCNA

Discussion in 'Routing & Switching' started by BraderzTheDog, Apr 9, 2012.

  1. BraderzTheDog

    BraderzTheDog Kilobyte Poster

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    Hey CF.

    I've been studying for the CCENT ICND1 and with an exam date now set for 2 weeks from now and most of the content covered, sub-netting is something that is still an issue for me. I have been looking at the CBT nuggets videos and although the are in depth, I don't think the 3 videos has given me it all...

    Anyone know a good place to learn?

    Regards,
    Brad.
     
    Certifications: CCNA R&S, CCNA-SEC, CCSA, JNCIA FWV, MCITP, MCTS, MTA, A+
  2. soundian

    soundian Gigabyte Poster

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    subnettingquestions.com - Free Subnetting Questions and Answers Randomly Generated Online

    I found that website extremely useful for getting my speed up, once I'd found a method that worked for me.

    I find out the block size first. Once I have the block size then I just have to follow the same steps every time.
    A bit like the old software adage:
    Question 1: A kettle is hanging on a hook in the kitchen.Write down step by step instructions for making a cup of tea.
    1. Take kettle off hook
    2. Put kettle in sink
    3. etc etc

    Question 2: This time the kettle is in the sink, write down the steps for making a cup of tea.
    1. Put kettle on hook
    2. Follow answer to question 1
     
    Certifications: A+, N+,MCDST,MCTS(680), MCP(270, 271, 272), ITILv3F, CCENT
    WIP: Knuckling down at my new job
  3. Coupe2T

    Coupe2T Megabyte Poster

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    What part of Subnetting do you still feel you have problems with?

    I used the following couple of sites to practice on until I felt everything had clicked, once it did I knew almost immediately and have been pretty comfortable with subnetting since (Although currently looking at VLSM, which you will come across in the ICND2 and that's baking my noodle a bit again at the moment! lol).

    IP Subnet Practice

    Subnetting Quiz #1

    Between those 2 sites I managed to understand Subnetting from 2 sides, one giving the broadcast and range of useful addresses etc and 2, being able to tell how many hosts would be available etc. The first site I probably spent more time on and helped me the most, but we all learn differently so may not be the same for you.
     
    Certifications: ECDL, Does that Count!?!
  4. BraderzTheDog

    BraderzTheDog Kilobyte Poster

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    Thank you very much,

    I'm gonna be hammering this out as I believe Cisco exams ensure you know you stuff when it comes to subnetting.

    I can follow class C pretty easy at the moment however on the CBT nuggets videos I seem to get lost when working with class A, Its hard to know where to stop if you get me?

    Anyway thanks very much ill deffo check both out :)

    Regards,
    Brad.
     
    Certifications: CCNA R&S, CCNA-SEC, CCSA, JNCIA FWV, MCITP, MCTS, MTA, A+
  5. Coupe2T

    Coupe2T Megabyte Poster

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    If ya get stuck with anything in particular then feel free to drop me a message, I'll help you out if I can. I've only recently been through it all myself so I know how you feel. :)
     
    Certifications: ECDL, Does that Count!?!
  6. Doghouse

    Doghouse New Member

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    I am taking a CCNA course currently. I am due to take my first CCNA exam in a few months. Subnetting is really confusing to me. Of a general IP address (xxx.xxx.xxx.xxx/yy) I can find the subnet, the # of hosts, the # of addresses and even the block #. However, I am unable to take this information and employ it to discern the ip addresses (last, firs, broadcast, etc.) and how to arrive at same. By writing it out in binary I can sometimes locate the network IP, but not all the time. Short of writing out the actual address (xxx.xxx.xxx.a-d, xxx.xxx.xxx.e-i, xxx.xxx.xxx.j-m, etc.) how does one take the block number and calculate them, especially when i get numbers of 4096 and such. It gets really confusing when these address, span multiple octets.

    Any suggestions?
     
  7. rocdamike

    rocdamike Byte Poster Gold Member

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    Hi Doghouse, do you have an example of a particular subnetting question you are having trouble with? If you do, post it here and we can help you.
     
    Certifications: CCNA R&S, CCENT, F5 101 Application Delivery Fundamentals, ITIL Foundation (2011), CompTIA (A+, Network+), MTA (Windows OS, Networking, HTML5)
    WIP: CCNA Security

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