Information Technology Reference
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The CCIE candidate needs to memorize Table 2-3, which shows numbers from 0 to 16 in
decimal, binary, and hexadecimal formats.
Decimal, Binary, and Hexadecimal Numbers
Table 2-3
Decimal Value
Hexadecimal
Binary
0
0
0000
1
1
0001
2
2
0010
3
3
0011
4
4
0100
5
5
0101
6
6
0110
7
7
0111
8
8
1000
9
9
1001
10
A
1010
11
B
1011
12
C
1100
13
D
1101
14
E
1110
15
F
1111
16
10
10000
Converting Binary to Hexadecimal
To convert binary numbers to hex, group the bits into groups of four, starting with the right-
justified bits. Groups of four bits are usually called nibbles. Each nibble has a hex equivalent.
The following are some examples.
Conversion Example 9:
Convert 0010011101 to Hex
Group the bits:
00 1001 1101
Answer:
09D
h
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