Pertemuan 1
Connecting to the Internet
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Discussion Topics
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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
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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)
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PC Basics
Personal Computer Subsystems
Backplane Components
• Printed circuit board (PCB)
• Backplane
• CD-ROM drive
• Network interface card (NIC)
• Central processing unit (CPU)
• Video card
• Floppy disk drive
• Audio card
• Hard disk drive
• Parallel port
• Microprocessor
• Serial port Mouse port
• Motherboard
• Power cord
• Bus
• Random-access memory (RAM)
• Read-only memory (ROM)
• System unit
• Expansion slot
• Power supply
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PC Basics
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PC Basics
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PC Basics
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PC Basics
PCI Expansion Slots
AGP Expansion Slot
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Network Interface Cards
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NIC and Modem Installation
• A modem, or modulatordemodulator, 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.
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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.
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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.
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TCP/IP description and configuration
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TCP/IP description and configuration
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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.
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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
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Troubleshooting Internet Connections
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Summary
• Three requirements for an Internet
connection are physical connection, a
logical connection and a Web browser.
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