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ICT (Networking is a group of computers and other peripheral devices…

- - - - Hubs/ Switches
        send and receive data in a network with 2+ comps(switch>hubs)
      - Central connection for all comps
  - - - For 1 person
        
        Range of les than 10 m
        
        Wired/ Wireless
    - - 2+ comps
        
        Small area- building, campus
        
        Physically connected(wires)
        
        Slow speed
        
        1 administrator
    - - Larger than LAN
        
        spreads across the city
        
        eg. tv, local bank
    - - 2+ comps located far away
        
        linked using satellite signal
        
        eg. telecom system- popular
        
        requires public communication
        
        large organisation & govt
  - - - several comps - clients
        
        main comp - server
    - - Few comps- equal capabilities, use. same resources
        
        No server/ client
  - - - simplest form of network
        
        2 nodes connected to each other
        
        suitable for small area
    - - Uses single communication line
        
        main cable acts as backbone
        
        transmits data in 1 direction
        
        provides data to all comps
        
        used for small network bcos if main cable fails network = X
    - - each device connected to main comp using point to point connection
        
        central comp= hub
        
        popular as cost is low & setup is easy
    - - All nodes connected in a O manner
        
        Data travels via all nodes till reaches final destination
        
        used in LAN + WAN
        
        if one comp goes down whole network gets affected
        
        slow
    - - Common
        
        Many star networks put together
        
        A failure of wire won't affect the Network
        
        Hard maintenance
    - - Each node connected to every node
        
        Handle large amt of data
        
        Common - wirleless
        
        high cost
- - - - Several tables
        
        Link tables together
    - - Small, fixed records
        
        Eg. MS Exel
  - - - Building blocks of database
        
        Store data in a structure
      - All columns are called fields
        
        All rows are called records
        
        Contains values of all feilds
        
        A set of character that represents a value
    - - helps to retrieve filtered data
        
        used to perform actions like delete
    - - attractive appearance
        
        accepts data from user
    - - Used to display selected data in a printable format