Learning by Doing: CISCO Certified Network ... - SCN Research

To convert a large hexadecimal number into decimal we just write down our hexadecimal
codes from the bottom up and then multiply them with successively larger powers of 16.
For example let’s convert the hex number 8C3B into decimal:
B 11 multiplied by 16 0 = 11 x 1 = 11
3 3 multiplied by 16 1 = 3 x 16 = 48
C 12 multiplied by 16 2 = 12 x 256 = 3072
8 8 multiplied by 16 3 = 8 x 4096 = +32768
8C3B 16 (hex) is equivalent to 35899 10 (dec)
Supplemental Lab or Challenge Activity:
1. Here are some more to try converting. Be sure to include binary, decimal and
hexadecimal conversions for each number.
a. 2047 10
b. 1011011101 2
c. 9BBB 16
d. 248 16
e. 35898 10
2. Try adding hexadecimal conversions to that table you made in the binary
numbering lab (from zero to 255).
So What Have I Learned Here?
In this lab you have learned about hexadecimal conversions. Hexadecimal is used for
MAC addresses and for sending information over the Internet. Later, when you learn to
use protocol inspectors, you will be able to see the actual codes sent in packet form over
the network. Then you can double-check the hexadecimal codes with binary and decimal
conversions. After all, we are not making you do math to be mean old fuddy-duddies.
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