12 thoughts on “IP Addressing In Depth

  1. For the network address of the first question off quiz 1 shouldn’t it be, Network: instead of Network:

    1. You’re exactly right! I’ll fix it.
      Well done!

      1. no you won’t 😀

  2. For the broadcast address of the 3rd question on quiz 1, why is it counted as 64 and not 16?
    11111111 11111111 11111111 11110000 for /26 1s, doesn’t that mean 4 in the last octet giving you 256-240=16?

    1. 240 being the sum of 128+64+32+16

  3. Hey! I’m a bit confused how to work out network address for Q2? Could I have some help, please.

    1. Do you mean
      Start by looking at the binary:
      1010 1100 . 0001 0000 . 0110 1111 . 0000 0001

      The CIDR notation is /30, which means the first 30 bits are the network address.
      The first 30 bits then, are

  4. Hi
    I am already a member but i am not able to access the Quizzes.
    Can you please check and let me know.


    1. Hi Narasimharao,
      What errors are you getting? Is it a login error?

  5. Hello,

    For the network address on question number 4 of Quiz 1 i am not sure how you got

    Shouldn’t it be If not could you please explain?

  6. The value of the third octet in is 252, subtracting this from 256 gives four.

    In the four times tables, the closest values to 56 are 56 and 60, meaning that is the network IP address, and is the broadcast address.

    I think you might want to double-check your maths

  7. Why Q1 5th question. , the network address is instead of ?

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