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Binary? :(

Discussion in 'A+' started by Andrew_P, Apr 15, 2006.

  1. Andrew_P

    Andrew_P Bit Poster

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    HI All,

    Is there any binary involved in the A+ as I researched a bit on the internet and it looks complicated to understand. I am also not very good at maths either! :(.

    I understand there is binary in the MCSE?

    Thanks

    Andrew
     
    Certifications: None at present
    WIP: A+
  2. Sparky
    Highly Decorated Member Award

    Sparky Zettabyte Poster Moderator

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    You can use binary when working with subnets, I didn’t get any questions like that in the A+ exam though.

    Also you can download the objectives of the A+ exam at the CompTIA website.

    This link might help you out for your future studies: 8)
    http://www.learntosubnet.com/
     
    Certifications: MSc MCSE MCSA:M MCSA:S MCITP:EA MCTS(x5) Security+ Network+ A+
    WIP: Exchange 2007\2010
  3. hbroomhall

    hbroomhall Petabyte Poster Gold Member

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    It helps considerably to be moderately fluent in binary and hexadecimal, particularly when dealing with things like networking.

    It isn't really hard - just requires some care.

    Harry.
     
    Certifications: ECDL A+ Network+ i-Net+
    WIP: Server+
  4. Boycie
    Honorary Member

    Boycie Senior Beer Tester

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    As far as the A+ is concerned you need to be able to convert binary into decimal and not the other way around (as far as i can remember). Hope this helps :thumbleft
    Just remember 128, 64, 32, 16, 8, 4, 2, 1 and you will be fine :)
     
    Certifications: MCSA 2003, MCDST, A+, N+, CTT+, MCT
  5. Mr.Cheeks

    Mr.Cheeks 1st ever Gold Member! Gold Member

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    The numbers are divided into 2? What is the partwhere we need to remember??? Im confused...
     
  6. Malnomates

    Malnomates Megabyte Poster

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    I'll give it my best shot Andrew...!

    Firstly,relax!!Binary is actually a very simple numbering system...

    We are taught to count using the numbers 0 to 9

    Binary uses no other numbers than 1 and 0

    You want to know what the binary number 1101 represents..

    Binary doesn't go 1,2,3,4 etc,it's presented here as 8,4,2,1 (in this example there are 4 binary digits...1101..

    What this is showing is 1 x 8,1 x 4,0 x 2 and 1 x 1
    = 1 1 0 1

    Think of the 1's as ON and 0's as OFF
    8 is on
    4 is on
    2 is off
    1 is on
    Now add all the on digits together and you have 8+4+0+1 =13

    This gives you the value for 1101 as 13

    So if you have a six digit binary number,say 110011 you have the following..1 x 32,1 x 16,0 x 8,0 x 4,1 x 2 and 1 x 1
    Thats 32+16+0+0+2+1
    So 110011=51

    Count Binary from right to left,start with 1 as the rightmost digit and double each digit to it's left,so it would read like this..

    256 128 64 32 16 8 4 2 1

    Of course the amount of 1' and 0's could be infinite but you're going to be dealing with mainly small (ish) binary numbers,say 4,8 or 16 bits in length..but don't panic,it's really quite manageable when you get used to it.

    Now I need a beer.... :eek:
     
    Certifications: A+ Network+
  7. Mr.Cheeks

    Mr.Cheeks 1st ever Gold Member! Gold Member

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    That is a brilliant Explanation of Binaries - Thank You...

    :thumbleft :thumbleft :thumbleft :thumbleft :thumbleft
     
  8. Sparky
    Highly Decorated Member Award

    Sparky Zettabyte Poster Moderator

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    Good explanation 8)
     
    Certifications: MSc MCSE MCSA:M MCSA:S MCITP:EA MCTS(x5) Security+ Network+ A+
    WIP: Exchange 2007\2010
  9. Andrew_P

    Andrew_P Bit Poster

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    I still dont get it malnomates :( but certainly seems good explanation.

    Sorry for being a bit thick! :cry:
     
    Certifications: None at present
    WIP: A+
  10. simongrahamuk
    Honorary Member

    simongrahamuk Hmmmmmmm?

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    The document included in this thread may help you. 8)
     
  11. Malnomates

    Malnomates Megabyte Poster

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    It will come to you Andrew,take your time to understand how it works and you will have a good start on your A+.

    If you need further help then feel free to ask.
     
    Certifications: A+ Network+
  12. Clyde

    Clyde Megabyte Poster

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  13. Andrew_P

    Andrew_P Bit Poster

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    Still seems confusing even looking at them sites :(.
     
    Certifications: None at present
    WIP: A+
  14. Sparky
    Highly Decorated Member Award

    Sparky Zettabyte Poster Moderator

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    Read it again, again and again. Then have a think. You cant learn the whole thing in 20 mins :biggrin
     
    Certifications: MSc MCSE MCSA:M MCSA:S MCITP:EA MCTS(x5) Security+ Network+ A+
    WIP: Exchange 2007\2010

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