1. Introduction to the Internet
Technology
Mrs. Huddleston

2. The Internet: A Definition
Internet—structure made up of millions of interconnected computers world wide whose users can communicate with each other and share information.
Huddleston - Introduction to the Internet

3. Physical Structure of the Internet
Computers
Servers
Routers
Satellites
Fiber-optic cables
Phone lines
Other telecommunications media
Huddleston - Introduction to the Internet

4. Utilizations of the Internet
World Wide Web—a system of interlinked documents, called hypertext, accessible via the Internet.
Telnet—remotely logging on to another computer.
FTP (File Transfer Protocol)—transferring files from one computer to another.
—electronic mail
Usenet—collection of discussion forums called newsgroups. (Chatrooms, message boards, blogs)
IM, Skype
Huddleston - Introduction to the Internet

5. Huddleston - Introduction to the Internet
Internet Vocabulary
Web Server—computer which stores the Web documents (pages, images, videos, etc.) that users access.
Web Browser—software program that access the Web document on a server, interprets the HTML and displays its contents on the user’s computer. (Firefox, Explorer, Chrome)
Huddleston - Introduction to the Internet

6. More Internet Vocabulary
ISP (Internet Service Provider)—business who gives you access to the Internet. (AOL, AT&T, Comcast)
IP Address—(Internet Protocol) a numerical identification assigned to any device on a network.
Huddleston - Introduction to the Internet

7. Types of Internet Connections
Modem/Dial-Up connection
Broadband Cable
DSL (Digital Subscriber Line)
Satellite Broadband
ISDN (Integrated Services Digital Network)
T1/T3
Fiber
Wireless (Wi-Fi)
WiMAX (Worldwide Interoperability for Microwave Access)
Huddleston - Introduction to the Internet

8. Modem/Dial-Up connection
Run over normal telephone lines
While online, your phone is unavailable for calls
Can be external or internal
Speed: kbs
Usually the slowest and cheapest connection
Huddleston - Introduction to the Internet

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Broadband Cable
Connects through your cable TV line
Connected all the time, and it doesn't tie up your phone line.
Speed: 512 kbs – 20 mbs
Huddleston - Introduction to the Internet

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DSL
Operates over normal telephone lines and can be used simultaneously with the telephone
Speed: 640 kbs – 9 mbs, depending on type of DSL and how far you are from the nearest telephone station
Huddleston - Introduction to the Internet

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Satellite Broadband
Two-way satellite broadband service transmits high-speed data via satellite to a dish antenna at your house.
Speed: kbs
Huddleston - Introduction to the Internet

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ISDN
Fewer errors in transmission
A single ISDN line can handle up to eight devices, including a PC, telephone, fax, and video, and you can have any two devices operating simultaneously
Operates over standard telephone wires and fiber optic circuits, meaning it's readily available
Speed: 128 kbs – 9 mbs
Huddleston - Introduction to the Internet

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T1/T3
The T-carrier system is a direct link to the Internet.
Very expensive and very fast
Speed: 1.5 – 54 mbs
Huddleston - Introduction to the Internet

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Wireless (Wi-Fi)
Speed: 2 – 54 mbs
Range: up to a few hundred yards
Huddleston - Introduction to the Internet

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WiMAX
Improvement on today’s Wi-Fi wireless
Transmits large amounts of digital bits via radio signals
Economical alternative to cable and telephone lines
Range: up to 30 miles
Speed: 50x as fast as Wi-Fi
Huddleston - Introduction to the Internet

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