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Network Hardware - Coggle Diagram

- - - - form a LAN by connecting devices within a building
      - connect different networks together
      - can often incorporate a modem within the hardware
    - - broadcasts data to all devices on a network
      - use a lot of bandwidth as it results in unnecessary data being sent
      - useful to link up a few games consoles for a local multiplayer game using a wired LAN
    - - more powerful
        
        Hub
        
        Bridge
      - stores the MAC addresses of devices on a network and filters data packets to see which devices have asked for them
        
        more efficient when demand is high
      - reduce the amount of latency
    - - connect two separate LAN networks
      - a computer can act as a bridge through the operating system
      - looks for the receiving device before it sends the message
        
        help save unnecessary data transfers, which improves the performance of a network
- - - - Hacking
        
        Hardware
        
        Viruses
  - - - Sharing information
        
        Sharing resources
        
        Sharing software
- - - - Advantages
        
        cheat set-up costs
        
        not tied down to a specific location
        
        can connect multiple devices without the need for extra hardware
        
        less disruption to the building due not wires being installed
      - Disadvantages
        
        interference can occur
        
        the connection is not stable
        
        it will lose quality through obstructions
        
        more open to hacking
        
        slower than wired networks
- - - - is usually hosted securely on another network, such as the internet, to provide connectivity
    - - allows an individual to connect devices to a desktop machine, or to form a Bluetooth connection with devices in a car
    - - is created when LANs are connected. This requires media such as broadband and cables,
    - - is a network of computers within the same building, such as a school, home or business
- - - - are used to control how data is transmitted across networks
- - - - all the workstations, servers and printers are joined to one cable
      - the cable a terminator is fitted to stop signals reflecting back down the bus
      - Advantages
        
        easy to install
        
        cheap to install
      - Disadvantages
        
        if the main cable fails or gets damaged, the whole network will fail
        
        as more workstations are connected, the performance of the network will become slower because of data collisions
        
        every workstation on the network 'sees' all of the data on the network, which can be a security risk
    - - Each device is connected in a ring so each one is connected to two other devices
      - Each data packet on the network travels in one direction
      - Each device receives each packet in turn until the destination device receives it.
      - Advantages
        
        this type of network can transfer data quickly as data only flows in one direction so there won't be any data collisions
      - Disadvantages
        
        if the main cable fails or any device is faulty, then the whole network will fail
    - - each device on the network has its own cable that connects
        
        Switch
        
        Hub
      - most popular way of setting up a LAN
      - You may find a star network in a small network of five or six computers where speed is a priority
      - Advantages
        
        very reliable
        
        high performing as no data collisions can occur
      - Disadvantages
        
        expensive to install as this type of network uses the most cable, and network cable is expensive
        
        extra hardware is required
        
        if a hub or switch fails, all the devices connected to it will have no network connection
- - - - Every piece of hardware on a network has a unique MAC address. This is embedded in the hardware when the product is made in the factory, and the user cannot change it.
    - - NICs enable desktop and laptop computers to connect to a network. NICs are small circuit boards that connect to the motherboard
- - - - computers that rquest information
    - - computers that provide information
    - - Client-server
        
        the relationship between two computers in which one, makes a request from another, the server
      - Peer-to-peer
        
        no single provider s responsible for being the server
      - DIFFERENCES
        
        Security
        
        Client-server
        
        The server controls security on the network
        
        Peer-to-peer
        
        No central control over security
        
        Management
        
        Client-sever
        
        The server manages the network. Needs a dedicated team of people to manage the sever
        
        Peer-to-peer
        
        No central control over the network
        
        Dependency
        
        Client-sever
        
        Clients are dependent on the server
        
        Peer-to-peer
        
        Clients are not dependent on a central server
        
        Performance
        
        Client-server
        
        The server can be upgraded to be more powerful and to cope with high demand
        
        Peer-to-peer
        
        If machines on the network are slow they will slow down other machines
        
        Backups
        
        Client-server
        
        Data is all backed up on the main server
        
        Peer-to-peer
        
        Each computer has to be backed up. Data can easily be deleted