Revolutionization of Computers and Wireless Technology

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Revolutionization of Computers and Wireless
Technology

• By Vincent Mays

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The Wireless Revolution

• Most dramatic change in connectivity comm in the
  past 5 years has been mobile and wireless phones
• Est. over 600 million mobile phones are in use
  worldwide
• Allows us to stay together at anytime and any
  place

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Communication Systems

• Electronic systems that transmit data from one
  location to another
• Whether wired or wireless every communication
  system has 4 basic elements

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Four Basic Elements

• 1) Sending and receiving devices
• 2)Connective devices
• 3)Communication Channel
• 4)Data transmission

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Physical Connections

• Telephone Lines
• Coaxial Cable
• Fiber Optic
• - 26,000 times the transmission capacity of
  twisted pair
• - compared to coaxial its faster lighter and more
  reliable when it comes to transmitting data

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Wireless Connections

• Satellite are used to send and receive large data
• Uplinks are you to send data
• Downlinks are you to receive data

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Modems

• Short for modulator-demodulator
• Modulator- process from converting digital to
  analog
• Demodulator- process from converting analog to
  digital

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Type of Connections

• Dial up service- standard telephone lines and
  conventional modems
• Cable Modems- use existing tv cables to provide
  high speed connections

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Protocols

• Identification- its a numeric address
• Reformatting- info sent or transmitted across the
  internet usually travels through numerous
  interconnected networks

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Configurations

• Topology- network arranged or configured in
  several different ways
• Ring Network- each device is connected to two
  other devices forming a ring

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Strategy

• Terminal Network System
• Client Server Network System

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Organizational Internets

• Intranet- private network within an organization
  that resembles the internet
• Extranets- private network that connects more
  than one organization
• Firewalls- security system designed to protect an
  organization network against external threats

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Terms

• Client- a node that requests and uses resources
  available from other nodes
• Server- a node that shares resources with other
  nodes
• Host Computer- a large centralized computer,
  usually a minicomputer or a mainframe