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Teracom Tutorial: Common Use for Hexadecimal

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Teracom Tutorial: Common Use for Hexadecimal
2.11  Number Systems (Fourth of Four Parts: Common Use for Hexadecimal)
Hexadecimal (or hex for short) is perhaps most often used in practice as a short form for binary numbers.
Since 161 = 24, conversion from binary to hex is simple.
Just segment the binary number into groups of four bits, and convert each set of four bits individually to their hex equivalent.
Why is hexadecimal used in this manner? Because the binary number system requires so many symbols to represent a given quantity.
Consider the binary representation of 1993D: 011111001001.
For readability, instead of commas we use semicolons: 0111:1100:1001.
The hexadecimal equivalent of this number is 7C9H.
The hex version uses only 1/4 the symbols, and so is easier to write and to pronounce.
Source: Teracom Course 101, Telecom, Datacom and Networking for Non-Engineers,
Module 2: Understanding Data Communications, slide 2.11
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