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Telecommunication, internet and wireless technology


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  • 1. Telecommunications, The Internet and Wireless technology Kristina
  • 2. Telecommunications  Communicating any kind of information through electronic means  Includes audio, video and digital data transmission
  • 3. Telecommunication System Components  Computers used to process data into information  Terminals that receive or send data  Communication Software  Communication Processors
  • 4. Functions of Telecommunication  Transmit the information  Control flow of information  Convert massages speed and format and route them through most efficient paths  Establish interface between sender and receiver
  • 5. Analog VS Digital Signals  Analog Signal is continuous waveform that passes through communication medium and is used for audio, video and voice communication  Digital Signal is discrete waveform because it transmits coded data in two discrete states: as 1bits and 0bits  Digital Signal is used for data communication  Modem converts/translates digital signals into analog and vice versa
  • 6. Wired VS Wireless Transmission  Wired: - Twisted wire: telephone systems - Coaxial cable: cable television - Fiber optics and Optical Network  Wireless: microwave, satellite, cellular telephones, etc.
  • 7. Types of Network  Star Network: all computers and other devices are connected to the host computer and if that computer’s network fails, no other computer won’t have network  Bus Network: links a number of computers by a single circuit, if one network connection fails doesn’t mean that the rest of computers’ networks will  Ring Network: all devices are connected through closed loop
  • 8. LANs, WANs and WLANs  LANs require their own dedicated channels such as routers, gateways, Network Operating Systems (NOS)  Span large geographical distance and consist of variety of cables and satellites  WLANs are Wi-Fis, they are low cost and enable high- speed mobile Internet access; links for groups
  • 9. Electronic Commerce and Business Technologies  Email: eliminates telephone costs  Groupware: allows groups to participate from different locations  Voicemail: digitalized spoken message transmitted over network  Fax: digitalized documents over telephone line
  • 10. Enterprise Networking VS Internetworking  Enterprise Networking arrangement of organization’s hardware, software, network and data resources  Internetworking connects all separated networks into one interconnected network
  • 11. Open Systems Interconnect (IOS) and Internet Service Provider (ISP)  IOS determines multiple-layer layouts to interconnect different devices  ISP organization with permanent connection to the Internet that provides it to its clients
  • 12. The Domain Name System (DNS)  The Domain Name System (DNS) is a naming system for computers, services, or any resource connected to the Internet or a private network.  It translates domain names meaningful to humans into the numerical identifiers associated with networking equipment for the purpose of locating and addressing these devices worldwide.
  • 13. Intranets VS Extranets  Intranet: Firewall – a hardware or software paced between an organization’s internal and external network which prevents outsiders from using/joining private network  Extranet: Private intranets extended to authorized users outside company