Ccna routing and Switching Complete Study Guide

169

Written Lab 4.3: Written Subnet Practice #3

Complete the following based on the decimal IP address.

Decimal IP Address

Address 

Class

Number of Subnet  

and Host Bits

Number of  

Subnets (2

x

)

Number of 

Hosts (2

x

 – 2)

10.25.66.154/23

172.31.254.12/24

192.168.20.123/28

63.24.89.21/18

128.1.1.254/20

208.100.54.209/30

---

170

 

Chapter 4 

■

  Easy Subnetting

Review Questions

The following questions are designed to test your understanding of this 

chapter’s material. For more information on how to get additional ques-

tions, please see 

www.lammle.com/ccna

.

You can find the answers to these questions in Appendix B, “Answers to Review 

Questions.”

1.  What is the maximum number of IP addresses that can be assigned to hosts on a local sub-

net that uses the 255.255.255.224 subnet mask?

A. 14

B. 15

C. 16

D. 30

E. 31

F. 62

2.  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?

A. 2

B. 3

C. 4

D. 5

E. 6

F. 7

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