P-2000W_V2 User’s Guide

Table 40 Subnet 4

 

NETWORK NUMBER

LAST OCTET BIT VALUE

 

 

 

IP Address

192.168.1.

192

 

 

 

IP Address (Binary)

11000000.10101000.00000001.

11000000

 

 

 

Subnet Mask (Binary)

11111111.11111111.11111111.

11000000

 

 

 

Subnet Address:

Lowest Host ID: 192.168.1.193

 

192.168.1.192

 

 

Broadcast Address:

Highest Host ID: 192.168.1.254

 

192.168.1.255

 

 

Example Eight Subnets

Similarly use a 27-bit mask to create 8 subnets (001, 010, 011, 100, 101, 110).

The following table shows class C IP address last octet values for each subnet.

Table 41

Eight Subnets

 

 

 

 

 

 

 

 

 

SUBNET

 

SUBNET ADDRESS

FIRST ADDRESS

LAST ADDRESS

BROADCAST

 

ADDRESS

1

 

0

1

30

31

 

 

 

 

 

 

2

 

32

33

62

63

 

 

 

 

 

 

3

 

64

65

94

95

 

 

 

 

 

 

4

 

96

97

126

127

 

 

 

 

 

 

5

 

128

129

158

159

 

 

 

 

 

 

6

 

160

161

190

191

 

 

 

 

 

 

7

 

192

193

222

223

 

 

 

 

 

 

8

 

224

225

254

255

 

 

 

 

 

 

The following table is a summary for class “C” subnet planning.

Table 42 Class C Subnet Planning

NO. “BORROWED” HOST

SUBNET MASK

NO. SUBNETS

NO. HOSTS PER

BITS

SUBNET

 

 

 

 

 

 

1

255.255.255.128 (/25)

2

126

 

 

 

 

2

255.255.255.192 (/26)

4

62

 

 

 

 

3

255.255.255.224 (/27)

8

30

 

 

 

 

4

255.255.255.240 (/28)

16

14

 

 

 

 

5

255.255.255.248 (/29)

32

6

 

 

 

 

6

255.255.255.252 (/30)

64

2

 

 

 

 

7

255.255.255.254 (/31)

128

1

 

 

 

 

116

Appendix B IP Subnetting

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ZyXEL Communications P2000W manual Example Eight Subnets, Class C Subnet Planning