CHAPTER 1

Introduction to Networking
Objectives
Upon completion of this chapter, you should be able to answer the following questions:
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What are the requirements for an Internet connection? What are the major components of a personal computer (PC)? What procedures are used to install and troubleshoot network interface cards (NICs) and modems? What basic testing procedures are used to test the Internet connection? What are the features of web browsers and plug-ins?

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What are the Base 2, Base 10, and Base 16 number systems? How do you perform 8-bit-binary-to-decimal and decimal-to-8-bit-binary conversions? How do you perform simple conversions between decimal, binary, and hexadecimal numbers? How are IP addresses and network masks represented in binary form? How are IP addresses and network masks represented in decimal form?

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Key Terms
This chapter uses the following key terms. You can find the definitions in the Glossary: Internet page 4 page 4 parallel port serial port page 10 page 10

enterprise network

Internet service provider (ISP) page 6 personal computers (PCs) page 7 page 8

mouse port page 10 keyboard port page 10 Universal Serial Bus (USB) port expansion slots page 10 page 11 page 10

central processing unit (CPU)

random-access memory (RAM) page 9 disk drive page 9 hard disk page 9

network interface card (NIC) video card page 11

input/output devices (I/O) page 9 motherboard memory chip page 9 page 9

sound card page 11 jack page 14

local-area network (LAN) page 14 continues 2

Networking Basics CCNA 1 Companion Guide

continued

Ethernet page 14 plug-and-play page 16 page 17 page 17

web browser page 26 web servers page 26 binary digit (bit) page 26 byte page 26

bits per second (bps) networking devices

Media Access Control (MAC) address page 19 servers page