IP Addressing & Subnetting Math

Question 1

Binary to Decimal Chart

Answer 1

00000000 = 0
10000000 = 128
11000000 = 192
11100000 = 224
11110000 = 240
11111000 = 248
11111100 = 252
11111110 = 254
11111111 = 255

Question 2

Decimal to Binary Chart

Answer 2

0 = 00000000
1 = 00000001
2 = 00000010
3 = 00000011
4 = 00000100
5 = 00000101
6 = 00000110
7 = 00000111
8 = 00001000
9 = 00001001
10 = 00001010
11 = 00001011
12 = 00001100
13 = 00001101
14 = 00001110
15 = 00001111
16 = 00010000
32 = 00100000
64 = 01000000
128 = 10000000
255 = 11111111

Question 3

CIDR to Decimal Chart

Answer 3

/8 = 255.0.0.0
/9 = 255.128.0.0
/10 = 255.192.0.0
/11 = 255.224.0.0
/12 = 255.240.0.0
/13 = 255.248.0.0
/14 = 255.252.0.0
/15 = 255.254.0.0
/16 = 255.255.0.0
/17 = 255.255.128.0
/18 = 255.255.192.0
/19 = 255.255.224.0
/20 = 255.255.240.0
/21 = 255.255.248.0
/22 = 255.255.252.0
/23 = 255.255.254.0
/24 = 255.255.255.0
/25 = 255.255.255.128
/26 = 255.255.255.192
/27 = 255.255.255.224
/28 = 255.255.255.240
/29 = 255.255.255.248
/30 = 255.255.255.252
/31 = 255.255.255.254
/32 = 255.255.255.255

Question 4

Binary to CIDR Chart

Answer 4

11111111.00000000.00000000.00000000 = /8
11111111.10000000.00000000.00000000 = /9
11111111.11000000.00000000.00000000 = /10
11111111.11100000.00000000.00000000 = /11
11111111.11110000.00000000.00000000 = /12
11111111.11111000.00000000.00000000 = /13
11111111.11111100.00000000.00000000 = /14
11111111.11111110.00000000.00000000 = /15
11111111.11111111.00000000.00000000 = /16
11111111.11111111.10000000.00000000 = /17
11111111.11111111.11000000.00000000 = /18
11111111.11111111.11100000.00000000 = /19
11111111.11111111.11110000.00000000 = /20
11111111.11111111.11111000.00000000 = /21
11111111.11111111.11111100.00000000 = /22
11111111.11111111.11111110.00000000 = /23
11111111.11111111.11111111.00000000 = /24
11111111.11111111.11111111.10000000 = /25
11111111.11111111.11111111.11000000 = /26
11111111.11111111.11111111.11100000 = /27
11111111.11111111.11111111.11110000 = /28
11111111.11111111.11111111.11111000 = /29
11111111.11111111.11111111.11111100 = /30
11111111.11111111.11111111.11111110 = /31
11111111.11111111.11111111.11111111 = /32

Question 5

Powers of Two Chart

Answer 5

2⁰ = 1
2¹ = 2
2² = 4
2³ = 8
2⁴ = 16
2⁵ = 32
2⁶ = 64
2⁷ = 128
2⁸ = 256
2⁹ = 512
2¹⁰ = 1,024
2¹¹ = 2,048
2¹² = 4,096
2¹³ = 8,192
2¹⁴ = 16,384
2¹⁵ = 32,768
2¹⁶ = 65,536
2¹⁷ = 131,072
2¹⁸ = 262,144
2¹⁹ = 524,288
2²⁰ = 1,048,576