Subnetting

Learn CCNA Routing and Switching

1. Which class of IP address provides a maximum of only 254 host addresses per network ID?

Class A
Class B
Class C
Class D


2. Which two of the following are private IP addresses?

12.0.0.1
168.172.19.39
172.20.14.36
172.33.194.30


3. What is the address range of a Class B network address in binary?

01xxxxxx
0xxxxxxx
10xxxxxx
110xxxxx


4. What is the maximum number of IP addresses that can be assigned to hosts on a local subnet that uses the 255.255.255.224 subnet mask?

14
15
30
31


5. You have a network that needs 29 subnets while maximizing the number of host addresses available on each subnet. How many bits must you borrow from the host field to provide the correct subnet mask?

2
3
4
5


6. What is the subnetwork address for a host with the IP address 200.10.5.68/28?

200.10.5.56
200.10.5.32
200.10.5.64
200.10.5.0


7. The network address of 172.16.0.0/19 provides how many subnets and hosts?

7 subnets, 30 hosts each
8 subnets, 8,190 hosts each
8 subnets, 2,046 hosts each
7 subnets, 2,046 hosts each


8. On a VLSM network, which mask should you use on point-to-point WAN links in order to reduce the waste of IP addresses?

/27
/28
/29
/30


9. What is the subnetwork number of a host with an IP address of 172.16.66.0/21?

172.16.36.0
172.16.48.0
172.16.64.0
172.16.0.0


10. You have an interface on a router with the IP address of 192.168.192.10/29. Including the router interface, how many hosts can have IP addresses on the LAN attached to the router interface?q10

6
8
30
62

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