Calculate the IP Address in CISCO

192.168.1.150/28

The first calculate the Subnet Mask

27 2

6 2

5 2

4 2

3 2

2 2

1 2

0 = 128 , 64 , 32 , 16 , 8 , 4 , 2 , 1

192.168.1.150/28

255.255.255.240 ----------- 1. 255.255.255.0/24

2. 255.255.255.128/25 (0+128)

3. 255.255.255.192/26 (128+64)

4. 255.255.255.224/27 (192+32)

5. 255.255.255.240/28 (224+16)

6. 255.255.255.248/29 (240+8)

Subnet Mask 255 255 255 240

IP Address 192 168 1 150

Subnet No 192 168 1 144

First IP 192 168 1 145

Latest IP 192 168 1 158

Broadcast Address 192 168 1 159

Calculate Subnet No for 144 = Magic No – Subnet Mask ( 256 - 240=16)

0

16 (0+16)

32 (16+16)

64 (32+16)

.

.

128(112+16)

144(128+16)

Take 144 because of (The last IP No is 150)

160(144+16)

Subnet No< The last IP Address NO

144<150

First IP Address

145 = Subnet N0 +1

Broadcast Address

159 = Subnet No +16(Subnet Mask ( 256 - 240=16)-1

144+16-1=159

Latest IP Address

The Last Broadcast No -1

159-1=158

The No of Host =(158-145=13)