14 thoughts on “IP Addressing In Depth”

  1. 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. 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

  2. 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?

  3. 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

  4. Hello there,

    Anyone can explain on obtaining network & broadcast add for the IP address below.

    Thank you.

    Quiz 1: Find the Network Address, Broadcast Address, and Number of Usable IP’s for These Networks /22

Leave a Reply Cancel reply