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

Table 3-1 outlines the major topics discussed in this chapter and the "Do I Know This Already?" quiz questions that correspond to those topics.

Table 3-1 "Do I Know This Already?" Foundation Topics Section-to-Question Mapping

Foundation Topics Section

Questions Covered in This Section

Score

Cable Access Technologies

1-8

Radio Frequency Signals

9-12

Data over Cable

13-16

Provisioning Cable Modems

17-18

Total Score

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 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 would be found in a cable subscriber's home?

a. Feeder network b. Transportation network c. Tap d. Amplifier

2. Which of the following terms describes RF signals transmitted from the headend to the subscriber?

a. Upstream b. Downstream c. HFC

d. CATV

3. Which of the following terms refers to a mixture of coaxial and fiber optic cable in the network?

b. COAX

c. DOCSIS

d. NTSC

4. Which of the following cable components would provide signal processing, formatting, and distribution?

a. Antenna site b. Headend c. Transportation network d. Distribution network e. Subscriber drop

5. The cable modem connects to the cable system network via which of the following components?

a. Antenna site b. Headend c. Transportation network d. Distribution network e. Subscriber drop

6. Remote antenna sites are connected to the headend via which of the following cable components?

a. Antenna site b. Headend c. Transportation network d. Distribution network e. Subscriber drop

7. A coaxial cable contains all but which of the following components?

a. Copper conductor b. Foil shielding c. Braided wire shielding d. Optical core

8. Cable systems came about to solve which of the following problems?

a. Poor-quality over-the-air transmissions b. RF bandwidth competition c. CATV regulations d. FCC mandate

9. Which of the following is the RF range of the electromagnetic spectrum?

a. 1 MHz to 5 MHz b. 10 GHz to 50 GHz c. 5 MHz to 1 GHz d. 500 kHz to 1 MHz

10. Specifications for data service over cable are defined by which of the following?

a. DOCSIS

b. NTSC

d. SECAM

11. The definition of data signals to be used by cable operators is a function of which of the following OSI layers?

a. Layer 1

b. Layer 2

c. Layer 3

d. Layer 4

12. Which version of the DOCSIS document defines the use of channel bonding in cable networks?

13. Which of the following are driving forces behind the advent of HFC networks?

a. Reduced signal degradation b. Invulnerability to outside electromagnetic interference c. Reduced service outages d. RF range density on fiber

14. Upon reaching the subscriber home, the signal strength must be at what minimum level to provide the necessary services?

15. The CMTS resides where in the cable system network infrastructure?

a. Transportation network b. Headend c. Subscriber drop d. Feeder trunks

16. In the subscriber home, which device takes the received signal and passes it on to individual devices?

a. Tap b. Splitter c. Television d. CM

17. During which step of the provisioning process does the CM find the pathway for data signals received from the headend?

a. Upstream setup b. Downstream setup c. Layer 1 and 2 establishment d. DOCSIS configuration

18. The DOCSIS configuration file is provided to the CM from which of the following devices?

a. DHCP server b. Headend c. TFTP server d. ToD server

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:

■ 12 or fewer overall score—Read the entire chapter. This includes the "Foundation Topics," "Foundation Summary," and "Q&A" sections.

■ 14 or 15 overall score—Begin with the "Foundation Summary" section, and then go to the "Q&A" section.

■ 16 or more 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.

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