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IP address block calculations

Discussion in 'Network Infrastructure' started by hailstorm, Sep 17, 2007.

  1. hailstorm

    hailstorm Bit Poster

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    Hi,

    I'm only into chapter 2 of the MS Press revision book for 70-291 and its already making me go cross eyed.

    Seems like there is quite a bit to memorize and also a bit of maths involved.

    This includes memorizing powers of 2, subnet mask octet values, common subnet masks and converting from slash to dotted-decimal notation.

    Memorizing values I think I'd just about cope with but when it comes to maths I suck. I can't devide or multiply to save my life.

    Just wondering how much of this is needed? Can I get by with the windows calculator?

    Thanks for any advice you can give.
     
    Certifications: ACTC, ACSP, MCP, MCDST, MCSA
    WIP: ACSA
  2. ffreeloader

    ffreeloader Terabyte Poster

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    Where I took my tests, no calculators allowed, and the Windows calculator was gone. Doing binary anding isn't multiplying or dividing, or even adding or subtracting. This is something you really need to get a handle on so you'll understand these concepts. I haven't taken 70-291, but when I took the equivalent for Win2K I had to do anding.
     
    Certifications: MCSE, MCDBA, CCNA, A+
    WIP: LPIC 1
  3. hailstorm

    hailstorm Bit Poster

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    hmm the book seems to warn against using decimal to binary conversions on the exam. Thats where the maths comes into it.
     
    Certifications: ACTC, ACSP, MCP, MCDST, MCSA
    WIP: ACSA
  4. ManicMonkey

    ManicMonkey Kilobyte Poster

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    ive done the 291 exam and as far as i can remember there was no hard calculations using binary, most i got was calculating subnet ranges.


    What is it you are struggling with?
     
    Certifications: MCSE
    WIP: Exchange, Share point - MOM as well
  5. BosonMichael
    Highly Decorated Member Award

    BosonMichael Yottabyte Poster

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    I'd highly recommend Network+ before attempting 70-291.
     
    Certifications: CISSP, MCSE+I, MCSE: Security, MCSE: Messaging, MCDST, MCDBA, MCTS, OCP, CCNP, CCDP, CCNA Security, CCNA Voice, CNE, SCSA, Security+, Linux+, Server+, Network+, A+
    WIP: Just about everything!
  6. hailstorm

    hailstorm Bit Poster

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    I've already completed MCDST. This is my last exam before I get MCSA. Would seem a bit of a diversion doing Network+ now. Not that I'm doubting it wouldn't help.
     
    Certifications: ACTC, ACSP, MCP, MCDST, MCSA
    WIP: ACSA
  7. BosonMichael
    Highly Decorated Member Award

    BosonMichael Yottabyte Poster

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    Well... that's what's gonna help you with those subnetting questions. Otherwise, you'll have to wade through the swamp and hope for the best...
     
    Certifications: CISSP, MCSE+I, MCSE: Security, MCSE: Messaging, MCDST, MCDBA, MCTS, OCP, CCNP, CCDP, CCNA Security, CCNA Voice, CNE, SCSA, Security+, Linux+, Server+, Network+, A+
    WIP: Just about everything!
  8. hailstorm

    hailstorm Bit Poster

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    Thanks for the advice. I'll consider the Network+. Anything that helps break down this monster exam. Another cert on the list certainly isn't a bad thing.
     
    Certifications: ACTC, ACSP, MCP, MCDST, MCSA
    WIP: ACSA

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