xetrevxetrev Member Posts: 59 ■■□□□□□□□□
Is hex on the ccna? if so anyone have a good tuturial on converting binary to hex and vice versa?


  • Options
    fuseboxfusebox Member Posts: 87 ■■□□□□□□□□
    Well basically, if you have an 8 bit binary number, you split it into two nibbles (4bits). Then convert those four bits into the Hex number.

    eg: Hex goes as follows;

    0000 - 0
    0001 - 1
    0010 - 2
    0011 - 3
    0100 4
    0101 5
    0110 6
    0111 7
    1000 8
    1001 9
    1010 A
    1011 B
    1100 C
    1101 D
    1110 E
    1111 F

    now supposing you had a the following 8bit binary number;

    10110011.... So split this into two... you get 1011 & 0011 now from the above, this equals B & 3 Therefore the equivalent Hex no. is B3

    Does that help.?
    Im a newbie.... please be easy on me.
  • Options
    xetrevxetrev Member Posts: 59 ■■□□□□□□□□
    yah thats cake, 20x easier then i thought.
    so 10101010 would be 170
    split that into 1010 and 1010
    which = AA?
  • Options
    Ricka182Ricka182 Member Posts: 3,359
    That is mad easy to remember...cool.
    i remain, he who remains to be....
  • Options
    fuseboxfusebox Member Posts: 87 ■■□□□□□□□□
    yep... thats pretty much it. :)
    Im a newbie.... please be easy on me.
  • Options
    xetrevxetrev Member Posts: 59 ■■□□□□□□□□
    thanks i am taking the exam thursday and while i was cramming i forgot that i did not know how to do the hex converstions. they are simple!
  • Options
    porengoporengo Member Posts: 343
    Good luck on your exam!
  • Options
    shadown7shadown7 Member Posts: 529
    Good luck on your exam!!
  • Options
    Fu LoserFu Loser Member Posts: 123
    Heres how I remember Hex.

    take four bits and create list of binary 0-15

    then take numbers 10-15.


    When you take your exam and you are writing everything you can remember on your white sheet before the test. The last 2 things (that I think) you should write out is a good complete IP table and then Hex down a side of the paper.

    A complete IP and Hex table will save you time and help prevent dumb math errors that you may make during your test ( assuming ou make the tables correct :D )


    go from Hex to decimal using this formula.


    x = First Hex character
    y = Second Hex Character

    example. FA

    (16*15)+10 = 250

    example. BD

    (16*11)+13 = 189
Sign In or Register to comment.