Appendix E Solutions to Configuration Problems

Chapter 2 Chapter 3 Chapter 5 Chapter 6 Chapter 7 Chapter 8 Chapter 9 Chapter 10 Chapter 11 Chapter 13 Chapter 14

1: The first octet rule says that the highest class C address is 223, but it is known that for eight bits the highest decimal number is 255. There are two more classes: Class D addresses are for multicast, and class E addresses are for experimental usage. Class D addresses have, as their first four bits, 1110. What is the decimal range of the first octet of class D addresses?

A: If the first four bits of a class D address are 1110, the lowest first octet is 11100000 and the highest first octet is 11101111. In decimal these two numbers are 224 and 239, respectively. Therefore, the first octet of a class D address will range from 224 to 239.

2: Select a subnet mask for 10.0.0.0 so that there will be at least 16,000 subnets with at least 700 host addresses available on each subnet. Select a subnet mask for 172.27.0.0 so that there are at least 500 subnets with at least 100 host addresses available on each subnet.

A: (a) Enough subnet bits n are needed so that 2n - 2 >= 16,000. There must be enough host bits h remaining so that 2h - 2 >= 700. A subnet mask of 255.255.252.0 provides 16,382 subnets of the class A address, and 1022 host addresses on each subnet. This mask is the only one that works. If one more bit is used for subnetting (255.255.254.0), there will not be enough host addresses. If one less bit is used for subnetting (255.255.248.0), there will not be enough subnets.

(b) Enough subnet bits n are needed so that 2n - 2 >= 500. Enough host bits h must remain so that 2h - 2 >= 100. A subnet mask of 255.255.255.128 provides 510 subnets of the class B address and 126 host addresses on each subnet. Again, this mask is the only one that works.

3: How many subnets are available if a class C address has six bits of subnetting? How many host addresses are available per subnet? Is there a practical use for such a subnetting scheme?

A: With six bits of subnetting, a class C address will have 26 - 2 = 62 subnets and 22 - 2 = 2 host addresses per subnet. With this subnetting scheme, a single class C address can be used for 62 point-to-point links. A point-to-point link requires only two host addresses—one for each end of the link.

4: Use a 28-bit mask to derive the available subnets of 192.168.147.0. Derive the available host addresses of each subnet.

A: A class C address with a 28-bit mask will have 14 subnets and 14 host addresses on each subnet. The subnets are derived first.

The subnets are:

11111111111111111111111111110000= 255.255.255.240 (mask) 1100000010101000100100110001000 0= 192.168.14 7.16 1100000010101000100100110010000 0= 192.168.14 7.32 11000000101010001001001100110000 = 192.168.147.48 11000000101010001001001101000000 = 192.168.147.64 11000000101010001001001101010000 = 192.168.147.80 11000000101010001001001101100000 = 192.168.147.96 11000000101010001001001101110000 = 192.168.147.112 11000000101010001001001110000000 = 192.168.147.128 11000000101010001001001110010000 = 192.168.147.144 11000000101010001001001110100000 = 192.168.147.160 11000000101010001001001110110000 = 192.168.147.176 11000000101010001001001111000000 = 192.168.147.192 11000000101010001001001111010000 = 192.168.147.208 11000000101010001001001111100000 = 192.168.147.224

Next, the host addresses for each subnet are derived. The broadcast addresses for each subnet are also shown.

The host addresses for each subnet are:

11000000101010001001001100010000 11000000101010001001001100010001 11000000101010001001001100010010 11000000101010001001001100010011 11000000101010001001001100010100 11000000101010001001001100010101 11000000101010001001001100010110 11000000101010001001001100010111 11000000101010001001001100011000 110000001010100010010011 0001 1001 11000000101010001001001100011010 11000000101010001001001100011011 11000000101010001001001100011100 11000000101010001001001100011101 110000001010100010010011 0001 1110 11000000101010001001001100011111 11000000101010001001001100100000 11000000101010001001001100100001 11000000101010001001001100100010 11000000101010001001001100100011 11000000101010001001001100100100 11000000101010001001001100100101 11000000101010001001001100100110 11000000101010001001001100100111 110000001010100010010011 0010 1000 11000000101010001001001100101001 11000000101010001001001100101010 11000000101010001001001100101011 11000000101010001001001100101100 110000001010100010010011 0010 1101 11000000101010001001001100101110 11000000101010001001001100101111 11000000101010001001001100110000 11000000101010001001001100110001 11000000101010001001001100110010 11000000101010001001001100110011 11000000101010001001001100110100 11000000101010001001001100110101 11000000101010001001001100110110 11000000101010001001001100110111 11000000101010001001001100111000 11000000101010001001001100111001 11000000101010001001001100111010 11000000101010001001001100111011 110000001010100010010011 0011 1100 11000000101010001001001100111101 11000000101010001001001100111110 11000000101010001001001100111111 11000000101010001001001101000000 11000000101010001001001101000001 11000000101010001001001101000010 11000000101010001001001101000011 11000000101010001001001101000100 11000000101010001001001101000101 11000000101010001001001101000110 11000000101010001001001101000111 11000000101010001001001101001000 11000000101010001001001101001001 11000000101010001001001101001010 110000001010100010010011 0100 1011 11000000101010001001001101001100 11000000101010001001001101001101

192.168.147.16 (subnet)

192.168.147.17

192.168.147.18

192.168.147.19

192.168.147.20

192.168.147.21

192.168.147.22

192.168.147.23

192.168.147.24

192.168.147.25

192.168.147.26

192.168.147.27

192.168.147.28

192.168.147.29

192.168.147.30 192.168.14 7.31(broadcast) 192.168.147.32(subnet)

192.168.147.33

192.168.147.34

192.168.147.35

192.168.147.36

192.168.147.37

192.168.147.38

192.168.147.39

192.168.147.40

192.168.147.41

192.168.147.42

192.168.147.43

192.168.147.44

192.168.147.45

192.168.147.46

192.168.147.47 (broadcast)

192.168.147.48 (subnet)

192.168.147.49

192.168.147.50

192.168.147.51

192.168.147.52

192.168.147.53

192.168.147.54

192.168.147.55

192.168.147.56

192.168.147.57

192.168.147.58

192.168.147.59

192.168.147.60

192.168.147.61

192.168.147.62

192.168.147.63 (broadcast)

192.168.147.64 (subnet)

192.168.147.65

192.168.147.66

192.168.147.67

192.168.147.68

192.168.147.69

192.168.147.70

192.168.147.71

192.168.147.72

192.168.147.73

192.168.147.74

192.168.147.75

192.168.147.76

192.168.147.77

11000000101010001001001101001110 = 192.168.147.78

11000000101010001001001101001111 = 192.168.147.79 (broadcast) 11000000101010001001001101010000 = 192.168.147.80 (subnet) 110000001010100010010011 0101 0001 = 192.168.147.81 110000001010100010010011 0101 0010 = 192.168.147.82 11000000101010001001001101010011 = 192.168.147.83 110000001010100010010011 0101 0100 = 192.168.147.84 11000000101010001001001101010101 = 192.168.147.85 110000001010100010010011 0101 0110 = 192.168.147.86 110000001010100010010011 0101 0111 = 192.168.147.87 110000001010100010010011 0101 1000 = 192.168.147.88 110000001010100010010011 0101 1001 = 192.168.147.89 110000001010100010010011 0101 1010 = 192.168.147.90 110000001010100010010011 0101 1011 = 192.168.147.91 110000001010100010010011 0101 1100 = 192.168.147.92 110000001010100010010011 0101 1101 = 192.168.147.93 110000001010100010010011 0101 1110 = 192.168.147.94 11000000101010001001001101011111 = 192.168.147.95 (broadcast) 11000000101010001001001101100000 = 192.168.147.96 (subnet) 110000001010100010010011 0110 0001 = 192.168.147.97 110000001010100010010011 0110 0010 = 192.168.147.98 110000001010100010010011 0110 0011 = 192.168.147.99 110000001010100010010011 0110 0100 = 192.168.147.100 110000001010100010010011 0110 0101 = 192.168.147.101 110000001010100010010011 0110 0110 = 192.168.147.102 110000001010100010010011 0110 0111 = 192.168.147.103 110000001010100010010011 0110 1000 = 192.168.147.104 110000001010100010010011 0110 1001 = 192.168.147.105 110000001010100010010011 0110 1010 = 192.168.147.106 110000001010100010010011 0110 1011 = 192.168.147.107 110000001010100010010011 0110 1100 = 192.168.147.108 110000001010100010010011 0110 1101 = 192.168.147.109 110000001010100010010011 0110 1110 = 192.168.147.110 11000000101010001001001101101111 = 192.168.147.111 (broadcast) 11000000101010001001001101110000 = 192.168.147.112 (subnet) 110000001010100010010011 0111 0001 = 192.168.147.113 110000001010100010010011 0111 0010 = 192.168.147.114 110000001010100010010011 0111 0011 = 192.168.147.115 110000001010100010010011 0111 0100 = 192.168.147.116 110000001010100010010011 0111 0101 = 192.168.147.117 110000001010100010010011 0111 0110 = 192.168.147.118 110000001010100010010011 0111 0111 = 192.168.147.119 110000001010100010010011 0111 1000 = 192.168.147.120 110000001010100010010011 0111 1001 = 192.168.147.121 110000001010100010010011 0111 1010 = 192.168.147.122 110000001010100010010011 0111 1011 = 192.168.147.123 110000001010100010010011 0111 1100 = 192.168.147.124 110000001010100010010011 0111 1101 = 192.168.147.125 110000001010100010010011 0111 1110 = 192.168.147.126 11000000101010001001001101111111 = 192.168.147.127 (broadcast) 11000000101010001001001110000000 = 192.168.147.128 (subnet) 110000001010100010010011 1000 0001 = 192.168.147.129 110000001010100010010011 1000 0010 = 192.168.147.130 110000001010100010010011 1000 0011 = 192.168.147.131 110000001010100010010011 1000 0100 = 192.168.147.132 110000001010100010010011 1000 0101 = 192.168.147.133 110000001010100010010011 1000 0110 = 192.168.147.134 110000001010100010010011 1000 0111 = 192.168.147.135 110000001010100010010011 1000 1000 = 192.168.147.136 110000001010100010010011 1000 1001 = 192.168.147.137 110000001010100010010011 1000 1010 = 192.168.147.138 110000001010100010010011 1000 1011 = 192.168.147.139 110000001010100010010011 1000 1100 = 192.168.147.140 110000001010100010010011 1000 1101 = 192.168.147.141 110000001010100010010011 1000 1110 = 192.168.147.142 11000000101010001001001110001111 = 192.168.147.143 (broadcast) 11000000101010001001001110010000 = 192.168.147.144 (subnet) 110000001010100010010011 1001 0001 = 192.168.147.145

11000000101010001001001110010010 = 192.168.147.146

11000000101010001001001110010011 = 192.168.147.147 110000001010100010010011 1001 0100 = 192.168.147.148 110000001010100010010011 1001 0101 = 192.168.147.149

11000000101010001001001110010110 = 192.168.147.150

11000000101010001001001110010111 = 192.168.147.151 110000001010100010010011 1001 1000 = 192.168.147.152 11000000101010001001001110011001 = 192.168.147.153 110000001010100010010011 1001 1010 = 192.168.147.154 110000001010100010010011 1001 1011 = 192.168.147.155 110000001010100010010011 1001 1100 = 192.168.147.156 110000001010100010010011 1001 1101 = 192.168.147.157 110000001010100010010011 1001 1110 = 192.168.147.158 11000000101010001001001110011111 = 192.168.147.159 (broadcast) 110000001010100010010011 1010 0000 = 192.168.147.160 (subnet) 110000001010100010010011 1010 0001 = 192.168.147.161 110000001010100010010011 1010 0010 = 192.168.147.162 110000001010100010010011 1010 0011 = 192.168.147.163 110000001010100010010011 1010 0100 = 192.168.147.164 110000001010100010010011 1010 0101 = 192.168.147.165 110000001010100010010011 1010 0110 = 192.168.147.166 110000001010100010010011 1010 0111 = 192.168.147.167 110000001010100010010011 1010 1000 = 192.168.147.168 110000001010100010010011 1010 1001 = 192.168.147.169 110000001010100010010011 1010 1010 = 192.168.147.170 110000001010100010010011 1010 1011 = 192.168.147.171 110000001010100010010011 1010 1100 = 192.168.147.172 110000001010100010010011 1010 1101 = 192.168.147.173 110000001010100010010011 1010 1110 = 192.168.147.174 11000000101010001001001110101111 = 192.168.147.175 (broadcast) 11000000101010001001001110110000 = 192.168.147.176 (subnet) 110000001010100010010011 1011 0001 = 192.168.147.177 11000000101010001001001110110010 = 192.168.147.178 110000001010100010010011 1011 0011 = 192.168.147.179 110000001010100010010011 1011 0100 = 192.168.147.180 110000001010100010010011 1011 0101 = 192.168.147.181 110000001010100010010011 1011 0110 = 192.168.147.182 110000001010100010010011 1011 0111 = 192.168.147.183 110000001010100010010011 1011 1000 = 192.168.147.184 110000001010100010010011 1011 1001 = 192.168.147.185 110000001010100010010011 1011 1010 = 192.168.147.186 110000001010100010010011 1011 1011 = 192.168.147.187 110000001010100010010011 1011 1100 = 192.168.147.188 110000001010100010010011 1011 1101 = 192.168.147.189 110000001010100010010011 1011 1110 = 192.168.147.190 11000000101010001001001110111111 = 192.168.147.191 (broadcast) 11000000101010001001001111000000 = 192.168.147.192 (subnet) 110000001010100010010011 1100 0001 = 192.168.147.193 110000001010100010010011 1100 0010 = 192.168.147.194 110000001010100010010011 1100 0011 = 192.168.147.195 110000001010100010010011 1100 0100 = 192.168.147.196 110000001010100010010011 1100 0101 = 192.168.147.197 110000001010100010010011 1100 0110 = 192.168.147.198 110000001010100010010011 1100 0111 = 192.168.147.199 110000001010100010010011 1100 1000 = 192.168.147.200 110000001010100010010011 1100 1001 = 192.168.147.201 110000001010100010010011 1100 1010 = 192.168.147.202 110000001010100010010011 1100 1011 = 192.168.147.203 110000001010100010010011 1100 1100 = 192.168.147.204 110000001010100010010011 1100 1101 = 192.168.147.205 110000001010100010010011 1100 1110 = 192.168.147.206 11000000101010001001001111001111 = 192.168.147.207 (broadcast) 11000000101010001001001111010000 = 192.168.147.208 (subnet) 110000001010100010010011 1101 0001 = 192.168.147.209 110000001010100010010011 1101 0010 = 192.168.147.210 110000001010100010010011 1101 0011 = 192.168.147.211 110000001010100010010011 1101 0100 = 192.168.147.212 110000001010100010010011 1101 0101 = 192.168.147.213

11000000101010001001001111010110 = 192.168.147.214

11000000101010001001001111010111 = 192.168.147.215 110000001010100010010011 1101 1000 = 192.168.147.216 110000001010100010010011 1101 1001 = 192.168.147.217 110000001010100010010011 1101 1010 = 192.168.147.218 110000001010100010010011 1101 1011 = 192.168.147.219 110000001010100010010011 1101 1100 = 192.168.147.220 110000001010100010010011 1101 1101 = 192.168.147.221 110000001010100010010011 1101 1110 = 192.168.147.222 11000000101010001001001111011111 = 192.168.147.223 11000000101010001001001111100000 = 192.168.147.224 110000001010100010010011 1110 0001 = 192.168.147.225 110000001010100010010011 1110 0010 = 192.168.147.226 11000000101010001001001111100011 = 192.168.147.227 110000001010100010010011 1110 0100 = 192.168.147.228 110000001010100010010011 1110 0101 = 192.168.147.229 110000001010100010010011 1110 0110 = 192.168.147.230 110000001010100010010011 1110 0111 = 192.168.147.231 110000001010100010010011 1110 1000 = 192.168.147.232 110000001010100010010011 1110 1001 = 192.168.147.233 110000001010100010010011 1110 1010 = 192.168.147.234 110000001010100010010011 1110 1011 = 192.168.147.235 110000001010100010010011 1110 1100 = 192.168.147.236 110000001010100010010011 1110 1101 = 192.168.147.237 110000001010100010010011 1110 1110 = 192.168.147.238 110000001010100010010011 1110 1111 = 192.168.147.239

(broadcast) (subnet)

( broadcast)

5: Use a 29-bit mask to derive the available subnets of 192.168.147.0. Derive the available host addresses of each subnet.

A: This solution shows a shorter technique than the last solution in which every host address of every subnet was written out.

A class C address with a 29-bit mask means that there will be 30 subnets and six host addresses on each subnet.

The subnets are:

111111111111111111111111 11111 000= 255.255.255.248 (mask) 110000001010100010010011 00001 000 = 192.168.147.8 110000001010100010010011 00010 000 = 192.168.147.16 110000001010100010010011 00011 000 = 192.168.147.24 110000001010100010010011 00100 000 = 192.168.147.32 110000001010100010010011 00101 000 = 192.168.147.40 110000001010100010010011 00110 000 = 192.168.147.48 110000001010100010010011 00111 000 = 192.168.147.56 110000001010100010010011 01000 000 = 192.168.147.64 110000001010100010010011 01001 000 = 192.168.147.72 110000001010100010010011 01010 000 = 192.168.147.80 110000001010100010010011 01011 000 = 192.168.147.88 110000001010100010010011 01100 000 = 192.168.147.96 110000001010100010010011 01101 000 = 192.168.147.104 110000001010100010010011 01100 000 = 192.168.147.112 110000001010100010010011 01111 000 = 192.168.147.120 110000001010100010010011 10000 000 = 192.168.147.128 110000001010100010010011 10001 000 = 192.168.147.136 110000001010100010010011 10010 000 = 192.168.147.144 110000001010100010010011 10011 000 = 192.168.147.152 110000001010100010010011 10100 000 = 192.168.147.160 110000001010100010010011 10101 000 = 192.168.147.168 110000001010100010010011 10110 000 = 192.168.147.176 110000001010100010010011 10111 000 = 192.168.147.184 110000001010100010010011 11000 000 = 192.168.147.192

11000000101010001001001111001000 = 192.168.147.200 11000000101010001001001111010000 = 192.168.147.208 11000000101010001001001111011000 = 192.168.147.216 11000000101010001001001111100000 = 192.168.147.224 11000000101010001001001111101000 = 192.168.147.232 11000000101010001001001111110000 = 192.168.147.240

Next, the broadcast addresses of each subnet are derived by setting the host bits of each subnet to all ones.

The subnet broadcast addresses are:

11000000101010001001001100001111 = 192.168.147.15 11000000101010001001001100010111 = 192.168.147.23 11000000101010001001001100011111 = 192.168.147.31 11000000101010001001001100100111 = 192.168.147.39 11000000101010001001001100101111 = 192.168.147.47 11000000101010001001001100110111 = 192.168.147.55 11000000101010001001001100111111 = 192.168.147.63 11000000101010001001001101000111 = 192.168.147.71 11000000101010001001001101001111 = 192.168.147.79 11000000101010001001001101010111 = 192.168.147.87 11000000101010001001001101011111 = 192.168.147.95 11000000101010001001001101100111 = 192.168.147.103 11000000101010001001001101101111 = 192.168.147.111 11000000101010001001001101100111 = 192.168.147.119 11000000101010001001001101111111 = 192.168.147.127 11000000101010001001001110000111 = 192.168.147.135 11000000101010001001001110001111 = 192.168.147.143 11000000101010001001001110010111 = 192.168.147.151 11000000101010001001001110011111 = 192.168.147.159 11000000101010001001001110100111 = 192.168.147.167 11000000101010001001001110101111 = 192.168.147.175 11000000101010001001001110110111 = 192.168.147.183 11000000101010001001001110111111 = 192.168.147.191 11000000101010001001001111000111 = 192.168.147.199 11000000101010001001001111001111 = 192.168.147.207 11000000101010001001001111010111 = 192.168.147.215 11000000101010001001001111011111 = 192.168.147.223 11000000101010001001001111100111 = 192.168.147.231 11000000101010001001001111101111 = 192.168.147.239 11000000101010001001001111110111 = 192.168.147.247

Finally, the host addresses for each subnet are derived. They will be all addresses between the subnet addresses and the subnet broadcast addresses.

Subnet

Broadcast

Host Addresses

192.168.147.8

192.168.147.15

192.168.147.9 - 192.168.147.14

192.168.147.16

192.168.147.23

192.168.147.17 - 192.168.147.22

192.168.147.24

192.168.147.31

192.168.147.25 - 192.168.147.30

192.168.147.32

192.168.147.39

192.168.147.33 - 192.168.147.38

192.168.147.40

192.168.147.47

192.168.147.41 - 192.168.147.46

192.168.147.48

192.168.147.55

192.168.147.49 - 192.168.147.54

192.168.147.56

192.168.147.63

192.168.147.57 - 192.168.147.62

192.168.147.64

192.168.147.71

192.168.147.65 - 192.168.147.70

192.168.147.72

192.168.147.79

192.168.147.73 - 192.168.147.78

192.168.147.80

192.168.147.87

192.168.147.81 - 192.168.147.86

192.168.147.88

192.168.147.95

192.168.147.89 - 192.168.147.94

192.168.147.96

192.168.147.103

192.168.147.97 - 192.168.147.102

192.168.147.104

192.168.147.111

192.168.147.105 - 192.168.147.110

192.168.147.112

192.168.147.119

192.168.147.113 - 192.168.147.118

192.168.147.112

192.168.147.119

192.168.147.113 - 192.168.147.118

192.168.147.120

192.168.147.127

192.168.147.121 - 192.168.147.126

192.168.147.128

192.168.147.135

192.168.147.129 - 192.168.147.134

192.168.147.136

192.168.147.143

192.168.147.137 - 192.168.147.142

192.168.147.144

192.168.147.151

192.168.147.145 - 192.168.147.150

192.168.147.152

192.168.147.159

192.168.147.153 - 192.168.147.158

192.168.147.160

192.168.147.167

192.168.147.161 - 192.168.147.166

192.168.147.168

192.168.147.175

192.168.147.169 - 192.168.147.174

192.168.147.176

192.168.147.183

192.168.147.177 - 192.168.147.182

192.168.147.184

192.168.147.191

192.168.147.185 - 192.168.147.190

192.168.147.192

192.168.147.199

192.168.147.193 - 192.168.147.198

192.168.147.200

192.168.147.207

192.168.147.201 - 192.168.147.206

192.168.147.208

192.168.147.215

192.168.147.209 - 192.168.147.214

192.168.147.216

192.168.147.223

192.168.147.217 - 192.168.147.222

192.168.147.224

192.168.147.231

192.168.147.225 - 192.168.147.230

192.168.147.232

192.168.147.239

192.168.147.233 - 192.168.147.238

192.168.147.240

192.168.147.247

192.168.147.241 - 192.168.147.246

6: Use a 20-bit mask to derive the available subnets of 172.16.0.0. Write the range (that is, the numerically lowest to the numerically highest address) of available host addresses for each subnet.

A: A class B address with a 20-bit mask will have 14 subnets and 4,094 host addresses on each subnet. The subnets are:

11111111111111111111000000000000 = 255.255.240.0 (mask)

10101100000100000001000000000000 = 172.16.16.0

10101100000100000010000000000000 = 172.16.32.0

10101100000100000011000000000000 = 172.16.48.0

1010110000010000 0100 000000000000 = 172.16.64.0

1010110000010000 0101 000000000000 = 172.16.80.0

10101100000100000110000000000000 = 172.16.96.0

1010110000010000 0111 000000000000 = 172.16.112.0

1010110000010000 1000 000000000000 = 172.16.128.0

1010110000010000 1001 000000000000 = 172.16.144.0

1010110000010000 1010 000000000000 = 172.16.160.0

1010110000010000 1011 000000000000 = 172.16.176.0

1010110000010000 1100 000000000000 = 172.16.192.0

1010110000010000 1101 000000000000 = 172.16.208.0

1010110000010000 1110 000000000000 = 172.16.224.0

The subnet broadcast addresses are:

1010110000010000 0001 111111111111 = 172.16.31.255

1010110000010000 0010 111111111111 = 172.16.47.255

1010110000010000 0011 111111111111 = 172.16.63.255

10101100000100000100111111111111 = 172.16.79.255

1010110000010000 0101 111111111111 = 172.16.95.255

1010110000010000 0110 111111111111 = 172.16.111.255

1010110000010000 0111 111111111111 = 172.16.127.255

1010110000010000 1000 111111111111 = 172.16.143.255

1010110000010000 1001 111111111111 = 172.16.159.255

1010110000010000 1010 111111111111 = 172.16.175.255

1010110000010000 1011 111111111111 = 172.16.191.255

1010110000010000 1100 111111111111 = 172.16.207.255

1010110000010000 1101 111111111111 = 172.16.223.255

1010110000010000 1110 111111111111 = 172.16.239.255

Using the derived subnet and broadcast addresses, the host addresses are:

Subnet

Broadcast

Host Addresses

172.16.16.0

172.16.31.255

172.16.16.1 - 172.16.31.254

172.16.32.0

172.16.47.255

172.16.32.1 - 172.16.47.254

172.16.48.0

172.16.63.255

172.16.48.1 - 172.16.63.254

172.16.64.0

172.16.79.255

172.16.64.1 - 172.16.79.254

172.16.80.0

172.16.95.255

172.16.80.1 - 172.16.95.254

172.16.96.0

172.16.111.255

172.16.96.1 - 172.16.111.254

172.16.112.0

172.16.127.255

172.16.112.1 - 172.16.127.254

172.16.128.0

172.16.143.255

172.16.128.1 - 172.16.143.254

172.16.144.0

172.16.159.255

172.16.144.1 - 172.16.159.254

172.16.160.0

172.16.175.255

172.16.160.1 - 172.16.175.254

172.16.176.0

172.16.191.255

172.16.176.1 - 172.16.191.254

172.16.192.0

172.16.207.255

172.16.192.1 - 172.16.207.254

172.16.208.0

172.16.223.255

172.16.208.1 - 172.16.223.254

172.16.224.0

172.16.239.255

172.224.16.1 - 172.16.239.254

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