This appendix is a copy of Chapter 12 from

This appendix is a copy of Chapter 12 from CCENT/CCNA ICND1 Official Exam Certification Guide, Second Edition. While the topics covered in this chapter are considered prerequisite materials for this book and for the ICND2 exam, this chapter is included for those of you who want more reading and practice on these topics but do not have a copy of CCENT/CCNA ICND1 Official Exam Certification Guide, Second Edition. In particular, this chapter covers the details of subnetting for IPv4, while showing in detail several processes that can be used to help you find the answers more quickly.

Note that other than these brief two leading paragraphs, this chapter is identical to Chapter 12 of the ICND1 book. As a result, any references in this chapter actually refer to elements of CCENT/ CCNA ICND1 Official Exam Certification Guide, Second Edition and can be ignored. Also note that the figures, tables, and examples use the numbering of the original chapter.

H A P P E N D I X

ICND1 Chapter 12: IP Addressing and Subnetting

The concepts and application of IP addressing and subnetting may well be the most important topics to understand both for being a well-prepared network engineer and for being ready to do well on the ICND1, ICND2, and CCNA exams. To design a new network, engineers must be able to begin with some IP address range and break it into subdivisions called subnets, choosing the right size of each subnet to meet design requirements. Engineers need to understand subnet masks, and how to pick the right masks to implement the designs that were earlier drawn on paper. Even more often, engineers need to understand, operate, and troubleshoot pre-existing networks, tasks that require mastery of addressing and subnetting concepts and the ability to apply those concepts from a different perspective than when designing the network.

This chapter begins Part III of the book, which is focused on the role of routers in an internetwork. As introduced in Chapter 5, the network layer defines and uses addressing, routing, and routing protocols to achieve its main goals. After this chapter goes into depth on addressing, the rest of the chapters in Part III focus on how to implement IP addresses, routing, and routing protocols inside Cisco routers.

All the topics in this chapter have a common goal, which is to help you understand IP addressing and subnetting. To prepare you for both real jobs and the exams, this chapter goes far beyond the concepts as covered on the exam, preparing you to apply these concepts when designing a network and when you operate and troubleshoot a network. Additionally, this chapter creates a structure from which you can repeatedly practice the math processes used to get the answers to subnetting questions.

"Do I Know This Already?" Quiz

The "Do I Know This Already?" quiz allows you to assess if you should read the entire chapter. If you miss no more than one of these 14 self-assessment questions, you might want to move ahead to the "Exam Preparation Tasks" section. Table 12-1 lists the major headings in this chapter and the "Do I Know This Already?" quiz questions covering the material in those headings so you can assess your knowledge of these specific areas. The answers to the "Do I Know This Already?" quiz appear in Appendix A.

3 Appendix H: ICND1 Chapter 12: IP Addressing and Subnetting

Table 12-1 "Do I Know This Already?" Foundation Topics Section-to-Question Mapping

Foundation Topics Section Exam Preparation Tools for Subnetting

Questions None

IP Addressing and Routing

1

Math Operations Used When Subnetting

2, 3

Analyzing and Choosing Subnet Masks Analyzing Existing Subnets

4?8 9?12

Design: Choosing the Subnets of a Classful Network

13, 14

1. Which of the following are private IP networks? a. 172.31.0.0 b. 172.32.0.0 c. 192.168.255.0 d. 192.1.168.0 e. 11.0.0.0

2. Which of the following is the result of a Boolean AND between IP address 150.150.4.100 and mask 255.255.192.0?

a. 1001 0110 1001 0110 0000 0100 0110 0100 b. 1001 0110 1001 0110 0000 0000 0000 0000 c. 1001 0110 1001 0110 0000 0100 0000 0000 d. 1001 0110 0000 0000 0000 0000 0000 0000

3. Which of the following shows the equivalent of subnet mask 255.255.248.0, but in prefix notation?

a. /248 b. /24 c. /28 d. /21 e. /20 f. /23

"Do I Know This Already?" Quiz 4

4. If mask 255.255.255.128 were used with a Class B network, how many subnets could exist, with how many hosts per subnet, respectively? a. 256 and 256 b. 254 and 254 c. 62 and 1022 d. 1022 and 62 e. 512 and 126 f. 126 and 510

5. A Class B network needs to be subnetted such that it supports 100 subnets and 100 hosts/subnet. For this design, if multiple masks meet those design requirements, the engineer should choose the mask that maximizes the number of hosts per subnet. Which of the following masks meets the design criteria? a. 255.255.255.0 b. /23 c. /26 d. 255.255.252.0

6. If mask 255.255.255.240 were used with a Class C network, how many subnets could exist, with how many hosts per subnet, respectively? a. 16 and 16 b. 14 and 14 c. 16 and 14 d. 8 and 32 e. 32 and 8 f. 6 and 30

7. Which of the following subnet masks lets a Class B network have up to 150 hosts per subnet, and supports 164 subnets? a. 255.0.0.0 b. 255.255.0.0 c. 255.255.255.0 d. 255.255.192.0 e. 255.255.240.0 f. 255.255.252.0

5 Appendix H: ICND1 Chapter 12: IP Addressing and Subnetting

8. Which of the following subnet masks let a Class A network have up to 150 hosts per subnet and supports 164 subnets? a. 255.0.0.0 b. 255.255.0.0 c. 255.255.255.0 d. 255.255.192.0 e. 255.255.252.0 f. 255.255.255.192

9. Which of the following IP addresses are not in the same subnet as 190.4.80.80, mask 255.255.255.0? a. 190.4.80.1 b. 190.4.80.50 c. 190.4.80.100 d. 190.4.80.200 e. 190.4.90.1 f. 10.1.1.1

10. Which of the following IP addresses is not in the same subnet as 190.4.80.80, mask 255.255.240.0? a. 190.4.80.1 b. 190.4.80.50 c. 190.4.80.100 d. 190.4.80.200 e. 190.4.90.1 f. 10.1.1.1

11. Which of the following IP addresses are not in the same subnet as 190.4.80.80/25? a. 190.4.80.1 b. 190.4.80.50 c. 190.4.80.100 d. 190.4.80.200 e. 190.4.90.1 f. 10.1.1.1

 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download