Subnetting

1. You need to subnet a network that has 5 subnets, each with at least 16 hosts. Which classful subnet mask would you use?

255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248


2. If an Ethernet port on a router were assigned an IP address of 172.16.112.1/25, what would be the valid subnet address of this host?

172.16.112.0
172.16.0.0
172.16.96.0
172.16.255.0


3. Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.255.224?

Router(config)#ip classless
Router(config)#ip version 6
Router(config)#ip subnet-zero
Router(config)#ip all-nets


4. You have a network with a subnet of 172.16.17.0/22. Which is the valid host address?

172.16.17.1 255.255.255.252
172.16.0.1 255.255.240.0
172.16.20.1 255.255.254.0
172.16.18.255 255.255.252.0


5. To test the IP stack on your local host, which IP address would you ping?

127.0.0.0
1.0.0.127
127.0.0.1
127.0.0.255

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