The Internet Connection


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  1. 1. Topic 3 INTERNET TECHNOLOGY3.2 The Internet 3.2.1 Overview of the Internet The Internet Connection 1
  2. 2. Learning OutcomeAt the end of this topic, students should be able to: • Describe various broadband and dial-up connections. 2
  3. 3. Topic Recall What is Network? • A network is a collection of computers and devices connected together via communications devices and transmission media. What is Internet? • The Internet is a worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals. 3
  4. 4. The Use of Internet What Can We Use the Internet For? • View web pages on the WWW (World-Wide Web). • Sending and receiving e-mail messages. • Sharing files. • Communicating using voice (VOIP) and video (video-conferencing). • Playing multi-player games. • Listening to streamed music or watching streamed video. 4
  5. 5. Connecting to the Internet REVISE BACK !!! (SLIDE 5- 11) Components required for successful communications system: Communications Transmission Devices Media 5
  6. 6. Connecting to the Internet Communications Devices: • Hardware component that enables a computer to send (transmit) and receive data, instructions, and information to and from one or more computers. Communications Devices Physical Channel Dial-Up Modem Telephone line Digital Modems: Digital line • DSL Modem (Digital Subscriber Modem/Wired Line) • Cable Modem Wireless Modems Cellular network Wireless Access Points Wireless Wired network 6
  7. 7. Connecting to the Internet Communications Devices: Cable Modem Dial-up Modem 7
  8. 8. Connecting to the Internet Communications Devices: Wireless Access Point Wireless Modem 8
  9. 9. Connecting to the Internet Transmission Media: Transmission Media • Materials or Physical/Wired Wireless substances Cable: Infrared capable of • Twisted-Pair Cable Broadcast Radio (radio carrying one or • Coaxial Cable signals): more signals in a • Fiber-Optic Cable • Bluetooth communications • Wi-Fi (wireless fidelity), • WiMAX (Worldwide channel. Interoperability for Microwave Access) Cellular Radio: • 2G • 3G • 4G Microwaves Communications Satellite 9
  10. 10. Physical Transmission MediaTwisted-pair cable Fiber-optic cable Coaxial cable 10
  11. 11. Wireless Transmission Media Cellular RadioCommunications Satellite Microwaves 11
  12. 12. Connecting to the Internet The basic differences between dial-up and broadband connection is the manner in which the connection is made. Types of Internet Connection/Internet Access: Dial-up Broadband connection Connection (Low-speed) (High-speed) 12
  13. 13. Connecting to the Internet Many home and small business users connect to the Internet via high-speed broadband Internet service and dial-up connection.Broadband Connection (High-Speed) Dial-Up Connection (Low-Speed)• Cable Internet Service • Dial-Up Connection• DSL (Digital Subscriber Line)• Fiber to the Premises (FTTP)• Fixed Wireless• Cellular Radio Network• Wi-Fi• Satellite Internet Service 13
  14. 14. Connecting to the Internet Broadband is a high-speed Internet connection provided through DSL, cable, fiber, radio signals, or satellite. 14
  15. 15. Connecting to the Internet Dial-up Internet access is a type of Internet connectivity that operates through a standard telephone line. By running the telephone line to a modem device in the personal computer, and configuring the computer to dial a specific phone number, the computer is granted Internet access. 15
  16. 16. Connecting to the Internet High-speed Broadband Internet Service: Broadband Connection (High-Speed)• Cable Internet • Provides high-speed Internet access through the Service cable television network via a cable modem. • Its provided by cable television companies using their existing television cable. • Provides high-speed Internet connections using regular copper telephone lines. • Internet service makes its connection by utilizing• DSL (Digital unused telephone wires that cause no Subscriber Line) interruption to your telephone service. • The speed with a DSL connection varies with your distance from the switching station. Your speed will be slower the further away you are and faster the closer you are to the switching station 16
  17. 17. Connecting to the Internet High-speed Broadband Internet Service: Broadband Connection (High-Speed)• Fiber to the • Uses fiber-optic cable to provide high- Premises speed Internet access to home and (FTTP) business users.• Fixed Wireless • Provides high-speed Internet connections using a dish-shaped antenna on your house or business to communicate with a tower location via radio signals.• Cellular Radio Network • Offers high-speed Internet connections to devices with built-in compatible technology or computers with wireless modems. 17
  18. 18. Connecting to the Internet High-speed Broadband Internet Service: Broadband Connection (High-Speed)• Wi-Fi (Wireless Fidelity) • Network uses radio signals to provide high-speed Internet connections to compatible or properly equipped wireless computers and devices.• Satellite Internet Service • Provides high-speed Internet connections via satellite to a satellite dish that communicates with a satellite modem. 18
  19. 19. Connecting to the Internet Low-speed Internet Service: Dial-Up Connection (Low-Speed)• Dial-Up Connection • Dial-up access takes place when the modem in your computer connects to the Internet via a standard telephone line that transmits data and information using an analog (continuous wave pattern) signal. 19
  20. 20. Data Transfer Rate in the Internet Connection What is Data Transfer Rate? • Data transfer rate, is the speed at which data can be transmitted between devices. (refer to how fast you are downloading file OR how fast your Internet Connection) • The data transfer rate of a device is often expressed in kilobits or megabits per second, abbreviated as kbps and mbps respectively. • It might also be expressed in kilobytes or megabytes, or KB/sec and MB/sec. 20
  21. 21. Data Transfer Rate in the Internet Connection The Data Transfer Rate: • 1,024 bits = 1 kilobit (Kb) • 8 kb = 1 kilobyte (KB) • 128 KB = 1 megabit (Mb) • 8 mb = 1 megabyte (MB) • 1,024 KB = 1 megabyte (MB) • 128 MB = 1 gigabit (Gb) • 8 gb = 1 gigabyte (GB) • 1,024 MB = 1 gigabyte (GB) 21
  22. 22. Relationship of Internet ConnectionRelationship between various types of Internet Connections with transmission media, communication devices, ISP and data transfer rateInternet Connection Transmission Media Communication Devices ISP Data Transfer RatesCable Internet Physical: Cable Cable Modem Astro: 128 Kbps to 52 MbpsService Wireless: Communication Dish-Shaped Antenna: Astro TV Satellite (MEASAT Satellite) (Satellite dish) Astro B.yond IPTVDSL (Digital Physical: Cable Network Interface Card (NIC) TMNet: 128 Kbps to 8.45 MbpsSubscriber Line) Wireless: Wireless Adapter Card Streamyx Broadcast Radio (Wi-Fi) Wireless Access PointFiber to the Physical: Cable Modem (BTU: TM Unifi 5 Mbps to 100 MbpsPremises (FTTP) Fiber-Optic Cable Broadband Termination Unit) Wireless Access Point: (ResidentialGateway:RG)Fixed Wireless Radio signals Dish-Shaped Antenna: (Satellite 256 Kbps to 10 Mbps dish) Tower LocationCellular Radio Cellular Radio: Wireless Modem Celcom, Maxis, 2G: 9.6 Kbps to 19.2 KbpsNetwork High-frequency radio Yes, P1 3G: 144 Kbps to 2.4 Mbps waves (2G, 3G & 4G) 4G: Up to 15 MbpsWi-Fi (Wireless Wireless: •Wireless Adapter Card TMNet Hotspots, 802.11 Series of Standards:Fidelity) Broadcast Radio (Wi-Fi) •Wireless Access Point P1, Yes • 802.11: 1 to 2 Mbps • 802.11a: Up to 54 Mbps • 802.11b: Up to 11 Mbps • 802.11g: 54 Mbps & higher • 802.11n: 108 Mbps & higherSatellite Internet Satellite Satellite modem 1 Gbps Satellite dish 22Service
  23. 23. Low-Speed :Relationship between various types of Internet Connections with transmission media, communication devices, ISP and data transfer rate Internet Transmission Media Communication Devices ISP Data Transfer Rates ConnectionDial-Up Physical: Telephone (Dial-Up) Telekom Limited to 56 KbpsConnection Cable Modem Malaysia 23
  24. 24. Data transfer rate (Ex:overseas) 24