Binary Translator - CCNA 1

Some of us; myself and some colleague attend the first of CCNA1 lesson. In the first module, we learnt about basic networking. One of the topic is about Binary, Decimal,hexdecimal (hope that I am correct).It is all about conversion and so on. Not wrong though to use the scientific calculator to do it, but the understanding of it may be not that easy.

Below are two video in Part 1 and Part 2, about teaching hex/binary/octal/radix

Part 1:

Part II: