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Basic Concept of Network, Between, Send/Receive data, Purpose, Digital…

- - - - Hardware capable of transmitting
        
        Data
        
        Instructions
        
        Information
    - - Modem
        
        Dial-up
        
        Convert
        
        Digital
        
        Analogue
        
        Digital
        
        ISDN
        
        DSL
        
        Cable
        
        Wireless
        
        Use mobile service provider network
        
        Connect Internet wireless from comp.
      - Network card
        
        Enable network access to device w/o built in networking capability
        
        AKA
        
        Network Interface Card(NIC)
      - Wireless Access Points
        
        Central Comm. Dev.
        
        Allow computers to transfers data wirelessly
        
        Among themselves
        
        To wired network
      - Router
        
        Connect
        
        Comp.
        
        Other routers
        
        Send
        
        Data to intended receiving comp.
      - Hub / Switch
        
        Provide
        
        Central point
        
        For cables in network
  - - - Materials capable of carrying comm. signals
    - - Physical
        
        Cables
        
        Twisted Pair
        
        Used in
        
        Network cabling
        
        Telephone sys.
        
        Consist
        
        2 Separate insulated copper wires
        
        Reduce noise
        
        Electrical disturbance that degrade comms.
        
        Coaxial
        
        Layers
        
        Insulating material
        
        Braided metal
        
        Plastic outer coating
        
        Used in
        
        Cable television Network Wiring
        
        Why?
        
        1 more item...
        
        Fibre-Optic Cable
        
        Layer
        
        Insulating glass cladding
        
        Protective coating
        
        Advantage
        
        More secure
        
        Comp. only join network if physically connected by cable
        
        Faster data transfer
        
        High bandwidth
        
        Shielded from interference
      - Wireless
        
        Def.
        
        Use air/space
        
        Types
        
        Infrared
        
        Short-range wireless signal :
        
        Used in mouse, printer
        
        Radio
        
        Broadcast
        
        Cellular
        
        Microwave
        
        Comm. satellite