Solution: Default Subnet Masks

This page is the solution of the exercise Exercise: Default Subnet Masks. Our recommendation to try all the exercises form Exercise: Default Subnet Masks by yourself and then see the solution whether the answers are correct or wrong.

[Note: The tutorial Default Subnet Masks Cheat Sheet may be useful to do all the exercises easily. ]

[1] 172.16.78.4

Answer: 255.255.0.0

[2] 123.125.23.1

Answer: 255.0.0.0

[3] 33.58.45.98

Answer: 255.0.0.0

[4] 220.22.22.98

Answer: 255.255.255.0

[5] 75.251.51.200

Answer: 255.0.0.0

[6] 223.12.22.110

Answer: 255.255.255.0

[7] 77.70.12.3

Answer: 255.0.0.0

[8] 197.78.85.2

Answer: 255.255.255.0

[9] 122.125.99

Answer: 255.0.0.0

[10] 192.250.32.40

Answer: 255.255.0.0

[11] 1.1.1.99

Answer: 255.0.0.0

[12] 213.67.89.54

Answer: 255.255.0.0

[13] 99.100.100.101

Answer: 255.0.0.0

[14] 78.116.25.25

Answer: 255.0.0.0

[15] 27.200.125.151

Answer: 255.0.0.0

[16] 192.168.3.3

Answer: 255.255.255.0

[17] 172.65.87.90

Answer: 255.255.0.0

[18] 10.0.0.1

Answer: 255.0.0.0

[19] 218.35.50.0

Answer: 255.255.255.0

[20] 8.0.0.0

Answer: 255.0.0.0

[21] 200.125.100.20

Answer: 255.255.255.0

[22] 3.13.33.30

Answer: 255.0.0.0

[23] 95.51.12.36

Answer: 255.0.0.0

[24] 159.26.37.64

Answer: 255.255.0.0

[25] 45.89.87.21

Answer: 255.0.0.0

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