CCENT, Video 19 Subnetting Answers

1. 200.1.1.0, break into 40 networks

40 networks = 00101000 (6 bits) Subnet Mask = 255.255.255.252 Increment = 4

Ranges: 200.1.1.0 – 200.1.1.3 200.1.1.4 – 200.1.1.7

200.1.1.8 – 200.1.1.11 200.1.1.12 – 200.1.1.15

…so on…

2. 199.9.10.0, break into 14 networks

14 networks = 00001110 (4 bits) Subnet Mask = 255.255.255.240 Increment = 16

Ranges: 199.9.10.0– 199.9.10.15 199.9.10.16 – 199.9.10.31 199.9.10.32 – 199.9.10.47 199.9.10.48 – 199.9.10.63 …so on…

3. 170.50.0.0, break into 1000 networks

1000 networks = 1111101000 (10 bits) Subnet Mask = 255.255.255.192 Increment = 64

Ranges: 170.50.0.0 – 170.50.0.63 170.50.0.64 – 170.50.0.127 170.50.0.128 – 170.50.0.191 170.50.0.192 – 170.50.0.255

170.50.1.0 – 170.50.1.63 …so on…

4. 12.0.0.0, break into 25 networks

25 networks = 00011001 (5 bits) Subnet Mask = 255.248.0.0 Increment = 8

Ranges: 12.0.0.0 – 12.7.255.255 12.8.0.0 – 12.15.255.255 12.16.0.0 – 12.23.255.255 12.24.0.0 – 12.31.255.255 …so on…