## Do I Know This Already Quiz

The purpose of the "Do I Know This Already?" quiz is to help you decide whether you really need to read the entire chapter. If you already intend to read the entire chapter, you do not necessarily need to answer these questions now.

The 14-question quiz, derived from the major sections in the "Foundation Topics" portion of the chapter, helps you determine how to spend your limited study time.

Table 12-1 outlines the major topics discussed in this chapter and the "Do I Know This Already?" quiz questions that correspond to those topics.

 Foundations Topics Section Questions Covered in This Section Analyzing and Interpreting IP Addresses and Subnets 1-10 Scaling the IP Address Space for the Internet 11-14

CAUTION The goal of self-assessment is to gauge your mastery of the topics in this chapter. If you do not know the answer to a question or are only partially sure of the answer, you should mark this question wrong for purposes of the self-assessment. Giving yourself credit for an answer that you correctly guess skews your self-assessment results and might provide you with a false sense of security.

1. Which of the following is the result of a Boolean AND between IP address 150.150.4.100, 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

2. 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. 510 and 126 f. 126 and 510

3. 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. 12 and 12 d. 8 and 32 e. 32 and 8 f. 6 and 30 g. 30 and 6

Which of the following IP addresses would not be in the same subnet as 190.4.80.80, mask 255.255.255.0?

Which of the following IP addresses would not be in the same subnet as 190.4.80.80, mask 255.255.240.0?

Which of the following IP addresses would not be in the same subnet as 190.4.80.80, mask 255.255.255.128?

7. Which of the following subnet masks would allow a Class B network to allow subnets to have up to 150 hosts and allow for up to 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 g. 255.255.255.192 h. 255.255.255.240

8. Which of the following subnet masks would allow a Class A network to allow subnets to have up to 150 hosts and would allow for up to 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 g. 255.255.255.192 h. 255.255.255.240

9. Which of the following are valid subnet numbers in network 180.1.0.0, when using mask 255.255.248.0?

10. Which of the following are valid subnet numbers in network 180.1.0.0, when using mask 255.255.255.0?

 a. 180.1.2.0 b. 180.1.4.0 c. 180.1.8.0 d. 180.1.16.0 e. 180.1.32.0 f. 180.1.40.0

11. Which of the following best describes a feature of CIDR?

a. Grouping a large number of Class C networks into a single group, and putting a single entry for that group in an Internet router, to reduce the overall size of the IP routing table b. To represent hundreds or thousands of client TCP or UDP connections from different hosts as that same number of connections, but making it appear as if all connections are from one host c. The use network 10.0.0.0 in an Enterprise network d. The use of addresses such as 0000:0000:0000:0000:0000:FFFF:FFFF:0A01:0101

12. The phrase "to represent hundreds or thousands of client TCP or UDP connections from different hosts as that same number of connections, but making it appear as if all connections are from one host" best describes which of the following tools?

d. IPv6

13. The phrase "grouping a large number of Class C networks into a single group, and putting a single entry for that group in an Internet router, to reduce the overall size of the IP routing table " best describes which of the following tools?

d. IPv6

14. The phrase "the use network 10.0.0.0 in an enterprise network" best describes which of the following tools?

d. IPv6

The answers to the "Do I Know This Already?" quiz are found in Appendix A, "Answers to the 'Do I Know This Already?' Quizzes and Q&A Sections." The suggested choices for your next step are as follows:

■ 11 or less overall score—Read the entire chapter. This includes the "Foundation Topics" and "Foundation Summary" sections and the Q&A section.

■ 12, 13, or 14 overall score—If you want more review on these topics, skip to the "Foundation Summary" section and then go to the Q&A section. Otherwise, move to the next chapter.