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Networks Unit 3 - Coggle Diagram

- - - - Each node connects to exactly two other nodes, providing a single pathway for signals through each node.
  - - - Good performance/fast network speed
        
        Easy to set up
        
        Easy to add more computer systems without taking the network down.
        
        Minimal network collisions
        
        Better security
    - - Expensive to install as more cable is required
        
        Extra hardware required, such as a hub
  - - - This is very reliable as it can 'self-heal' by reconfiguring around broken paths. This network is complex, expensive and difficult to set up. A large part of the network may be redundant
- - - - Hackers can gain access to data more easily.
        
        If the server is down, all workstations on the network are affected.
        
        Initial costs of servers, communication devices, etc can be expensive
- - - - Share data/files
        
        Easier for internal communication/can send an email
        
        Centralised backup
        
        Easier to monitor network activity
        
        Centralised maintenance (manage the network from one location)
        
        Can acces data from any computer
- - - - A LAN is a network in which computer systems are all located relatively close to each other, for example in the same building or on the same site such as school.
- - - - As the packets arrive at each computer system, it checks the destination address contained in the packet to see if it matches its own.
        
        The bus carries data packets along the cable.
        
        The bus has terminators on each end, which are needed to close each end of the cable.
        
        The computers (nodes) are connected to a single cable on which data can be sent, called the bus.
- - - - Routers - A router stores the addresses of computers on the network and transfers data between devices.
        
        Gateways - A gateway joins together two networks that use different base protocols, e.g. links a LAN to WAN.
        
        Bridge - A bridge joins together two networks that use the same base protocols, e.g. links LAN to LAN.