1

Pertemuan 1 Connecting to the Internet

Discussion Topics

• Requirements for Internet connection• PC basics• Network interface card• NIC and modem installation• Overview of high-speed and dial-up connectivity• TCP/IP description and configuration• Testing connectivity with ping• Web browser and plug-ins• Troubleshooting Internet connection problems

2

3

Requirements for Internet Connection

• A physical connection is made by connecting a specialized expansion card such as a modem or a network interface card (NIC) from a computer (PC) to a network.

• The logical connection uses standards called protocols. • The application that interprets the data and displays the information

in an understandable form is the last part of the connection. – Web browser – File Transfer Protocol (FTP)

4

PC Basics

Personal Computer Subsystems • Printed circuit board (PCB) • CD-ROM drive • Central processing unit (CPU) • Floppy disk drive • Hard disk drive • Microprocessor • Motherboard• Bus • Random-access memory (RAM) • Read-only memory (ROM) • System unit • Expansion slot • Power supply

Backplane Components

• Backplane

• Network interface card (NIC)

• Video card

• Audio card

• Parallel port

• Serial port Mouse port

• Power cord

5

PC Basics

6

PC Basics

7

PC Basics

8

PC Basics

AGP Expansion Slot

PCI Expansion Slots

9

Network Interface Cards

10

NIC and Modem Installation

• A modem, or modulator-demodulator, is a device that provides the computer with connectivity to a telephone line.

• PCMCIA wired and wireless NICs.

• Desktop systems may use an internal or external NIC.

11

High-Speed and Dialup Connectivity

• Inevitably the high-speed services used in the corporate environment, such as Digital Subscriber Line (DSL) and cable modem access, moved to the consumer market.

• These services no longer required expensive equipment or a second phone line.

• These are "always on" services that provide instant access and do not require a connection to be established for each session.

• This gives greater reliability and flexibility, and has led to the ease of Internet connection sharing by small office and home networks.

12

TCP/IP Description and Configuration

• Transmission Control Protocol/Internet Protocol (TCP/IP) is a set of protocols or rules developed to allow cooperating computers to share resources across a network.

13

TCP/IP description and configuration

14

TCP/IP description and configuration

15

Testing Connectivity with Ping

• The ping command works by sending multiple IP packets to a specified destination. Each packet sent is a request for a reply.

• The ping command is used to test the NIC transmit/receive function, the TCP/IP configuration, and network connectivity.

16

Web Browser and Plug-Ins

Sample of plug-in applications• These applications work in conjunction with the browser to launch

the program required to view the following special files: • Flash – plays multimedia files, which was created by Macromedia

Flash • Quicktime – plays video files, which was created by Apple • Real Player – plays audio files

17

Troubleshooting Internet Connections

18

Summary

• Three requirements for an Internet connection are physical connection, a logical connection and a Web browser.